Retrobrighting with just Sun? Read FAQ! 👇

Retrobrighting with just Sun? Read FAQ! 👇


Hello bit biters! Well, in part one of my investigations We’re trying to find a no-mess way to retrobite a computer without dismantling it into tiny pieces And we made some pretty interesting discoveries but no huge successes with that ozone method But oh, how the tables have turned! No.. no, they haven’t turned yellow And I just can’t wait to share an incredible discovery with you That I’m gonna call Lightbrighting Now, I’m ready to enlighten you.. now So, welcome back to Retrobrighting Recipes! Now as well as continuing to work with Groggle Bob from part one In this video I’ve also been working with Dr. Richard Blair, PhD From the research faculty in the Florida Space Institute. And Dr. James Pickett, PhD Yeah, it’s a paradox Well, he’s the chemist who’s worked for Plastic Polymer Degradation issues for GE Global Research since the 80’s Until recently… talk about retro.. But before I share the mind-blowing discovery with you We should first quickly address some of the other ideas that came from you guys, after the last video Number 1 As to why the 7-Bit Guy got results with ozone and I didn’t in identical test It was pointed out that Texas is more humid than California And indeed humidity can help catalyze that reaction In theory, we could add a fine water mister and get better results Or a water misses… equal rights Number 2 We could try Sterile Hydrogen Peroxide Gas Plasma Machine And just put the computer in there And they’re pretty cheap Only $5,000 to $8,000, actually So, I’ve ordered seven of them No, seriously though, I haven’t … ..because they would likely cause the same damaging oxidation that broke my Macintosh drive gear Oh, geez! No, make it stop! But it might effectively give us a ready-made air brightening machine Number 3. Someone also pointed out that many hair dryers produce ozone They include ozone generators And they’re usually called ionic And they could provide both heat and ozone in one Though still, we’re left with the issue of oxidation of the electronics inside Number 4 There was my theory that the $8 Guy’s dollar coins Placed in his bag, might have helped catalyze things And it was pointed out by someone that copper is used as a catalyst In some cases for organic synthesis And you know plastic is an organic Carbon containing compound So, an ozone reaction might be catalyzed by the presence of copper coins in the bag with the ozone Hm.. And 5 By far the most common suggestion was to put the ozone generator inside the bag So it would concentrate its own ozone I’ve tried this for 24 hours, at room temperature, to no avail Maybe with heat and humidity and coins, it would go better But again, it doesn’t really solve that problem of oxidizing the delicate electronics But one thing does Stefan Aquila directed me to a thread on a German forum called Forum64.de Now, I had a lot of trouble understanding the discussion My German isn’t really so good Even if I do do an okay Jan Beta impersonation (Jan Beta voice) Hi! It’s Jan Beta! And Google Translate wasn’t really much help either But one thing I did understand, were their pictures A huge thanks to Superingo for sharing them with us here And the method seems simple, you know Almost too simple They just put the computers outside in the Sun And that’s it No, seriously. That’s it. I couldn’t find in the forum or understand a real hypothesis of why this might work And even the 8-bit Governor agreed, it make no sense But I did at least give it a go And one thing I did understand was that they mentioned how bones are not really white in real life Wel.. not alive. Yeah, but if you leave them in the desert They do bleach bright white And then one who spoke patio furniture outside Or left the towel in the sun for a few weeks, we’ve seen that bleaching effect of the sun Even your hair can go bleach blonde in the sun But in either case, it takes weeks or months Well, anyway, I placed these items outside on what was a very overcast day, here in California The high was freezing 20 degrees Celsius. That’s .. double it and add 30.. Yes, 70 Fahrenheit Well, Dr. Richard Blair also put a cloth over half of his Windbest keyboard, on the same day We both tried our experiments And when I brought them in at night and looked at them inside I couldn’t believe my ears.. eyes.. sorry But while I was in shock, you know, they showed a genuine lightening In one day! Even that ski-mask yellowing around the Macintosh screen where it had had a Polaroid filter on it Was noticeably less Stark Oh.. Tony Stark Ah.. Arya Stark! Well, the Omnibot was also a little whiter particularly at the bottom where had been facing upwards And the Amiga 2000 keyboard In honor of Commodore who went out of business 25 years ago this week It too looked lighter And you can clearly see where the cloth was on the Windbest keyboard What hadn’t changed was that Amiga 500 keyboard But that was an extreme case. But yeah, generally the results were really mind-blowing I also engaged a small army of my Patrons to run their own tests at home over just one day Here are the before and after photos And it’s clear to see a definite lightening effect after just a few hours and often on overcast cloudy days Mattsoft also shared with me a one-week test he did By placing a strip of tape over the case And that Commodore 128 came noticeably lighter around the tape And Xavier Bell also tried using a sunbed However, I couldn’t see any results And really nothing can match the solar power of the Sun In a moment, I’ll take you through our hypothesis of what we think is going on here After all if Sun makes plastics yellow How can Sun make plastics Deyellow, right? Right. But first speaking of that A500 keyboard Let’s run some very quick tests Firstly, let’s melt some of the keys with a hot air gun to test that theory that heat can also yellow plastics Because we’ve all heard stories of computers that have yellowed from just being in a dark stuffy attic With no un Casualties of war here And look at that The melted key on the left is noticeably darker than the ones next to it So that reaction I explained in the first video is definitely sped up by heat alone Even devoid of UV So that tells us heat is a factor in yellowing Not just sunlight And sunlight is what we’re using to Deyellow here Next, someone asked how deep the yellowing is And that’s another good question Dr. Pickett actually suggested we try a headlamp deyellowing polish I’ve never heard of that before but my fear is it will rub away logos or key lettering But he coinvented the yellowing coating used on many modern car headlights today I think it’s worth trying I did find these at my local auto parts store And sure enough, they mentioned the deyellowing Now, I don’t really have time to do a full investigation in this video But let me know if you give it a go I’ll put a link in the description below to this product and all the recipe ingredients that you need from today’s menu Interesting that these things come with UV blocking wipes Which, gave me an idea More on that in a moment I’ll also put a link, below by the way, for the Lightbrighting Turntable, as I’m’ calling it Perrfect to ensure even distribution of the sun’s deyellowing effect See I told you the tables are turned! But let’s test how deep the yellowing goes on those donor keys ..to see if the polish is likely to work And don’t worry, we’ll refurbish this key in a future episode As we can see the yellowing is really superficial In fact, Dr. Pickett says UV damage will usually be confined to the top 35 µM of the surface But lets sand away a rarely light layer Wow! So, It’s quite possible that headlight deyellowing polish would work wonders In some cases .. oh, keys.. or cases Alright, so back outside to the mind-blowing experiment And let’s look at some before and after photos, after three days Even if one of them was rainy You remember Dr. Blair’s cloth test? Well, I asked him to keep trying on successive days And he moved the cloth over an inch each time This gives us a nice scientific depiction of what’s going on each day And he moved it over again for day three And now we have a tritone gradient showing the cumulative lightbrighting effect If we just enhanced the contrast, you can really see what’s happening to the plastic Now, I’m first to admit that this method is slower than using bleach But as a result is also less destructive And because you don’t have to rely on buying bottles or putting things in one table at a time You can put your whole collection out at once Albeit, for several days You know, as these things took 10, 20, 30 years to yellow What’s a week or two, really? And even that stubborn A500 keyboard looks a little bit lighter Interestingly, also those number keys that I’d melted and darkened Responded even faster to the lightening And my amstrad PCW was even more interesting You can see the original case color under what used to be an Apple sticker And then the yellowing under the rectangle And the lightbrighting effect around the rest of the case Is nearly back to the original color Here’s our hypothesis of what’s going on The new computer with it’s fresh healthy plastic starts its life Well inside your house, usually out of direct blazing sunlight When it yellows over a long period of time, usually many years, sat on a desk, or under a TV, away from the window This means it’s getting three things. It’s getting diffused sunlight Specifically UVA rather than direct windowsill sunlight 2. It’s getting exposure to often fluorescent lighting Which also has a damaging yellowing effect on plastics 3. It’s getting general air oxidation warmth And what we showed with the Melting experiment that warmth is a factor Even low warmth over many years It’s our hypothesis that these three factors together caused the yellowing So if you have an old computer that miraculously hasn’t yellowed I’d be willing to bet money on one or more of those three variables being less in your particular environment fact In fact, I’ll bet some of the 8-Bit Guy’s Coins The second differentiating factor is crucial one Is that, after those years the plastic is in a sensitive highly degraded yellow state Is changed from when you first opened the box and got that distinctive ABS aroma And quite ironically, that sensitivity Makes it sensitive to deyellowing And that might explain why the plastic that we had just melted was more sensitive And therefore more sensitive to that quicker deyellowing that we just saw The Sun gave and the Sun has taken away Blessed be the name of the Sun Steve Jobs 1:21 So how does simply popping it in the garden caused deyellowing? Well, in that instance, instead of diffused in direct sunlight inside the house The sensitive computer plastic is getting bright direct sunlight Even through clouds, it still gets UV And that all happens in a concentrated dose over a few hours, not years Even three days is really just 24 hours of sunlight So put really simply Your hair doesn’t lighten inside your house even on a sunny day But out on the beach hair will degrade and bleach Bleach Beach Even if you don’t have plastic hair like some people Ultraviolet, wave. Yes! It’s a glitch in the plastics matrix Neo So, let’s recap Diffused sunlight through window glass plus fluorescent lighting and warm air, oxidation Over the course of years Causes slow yellowing to that new plastic Conversely, bright direct sunlight in a concentrated dose makes that degraded and sensitive older plastic Receptive to bleaching Well, that’s the incredible discovery And as the why most of us haven’t really realized this till now I didn’t really think that just hardly anybody thought of trying it because At first glance, it just seems so counterintuitive What isn’t counterintuitive? Ordering your PCBs from PCBWay! They offer free worldwide shipping on PCB assembly orders And up to 30% off PCBs right now And as I mentioned, PCB stands for Polymer Carbon Bonds Doesn’t it? So what about downsides? Well, Dr. Pickett, he did some research in some similar areas, not quite the same And that research indicates that the yellowing might return But will never reach its original yellow level You can see here the massive drop in yellowness when exposed to sunlight And a more gradual return But never to its full peak And the more you repeat the process, the more the yellowing stays away I’ll put a link to that similar research paper in the recipe ingredients below And yes, you’ll get similar bleaching results on a windowsill, as long as it’s in direct sunlight Though outdoors is probably just easier And more interesting for your pets But the yellowing that might return can be prevented apparently With exposure to blue light Even standard warm white LED light bulbs contain a decent amount of blue light And more and more houses have windows with you know, UV coatings and LED lighting nowadays Anyway, so this re-yellowing effect might become a thing of the past Literally. In any event, if you’ve Retrobrighted using any method I now recommend changing to LED bulbs in the room where that computer is Once I have the bleaching where I want it I’m also gonna use these UV blocking wipes, similar to the ones we saw earlier, on the plastic Sort of as a sunscreen for computers But for every downside there is the light bright side It doesn’t cause brittleness as fast as the traditional retrobrighting method might At least, that’s our hypothesis You see hydrogen peroxide is likely to penetrate into any uneven cracks Undetectable cracks that might be in the plastic And Dr. Pickett says that would be very bad for the brittleness. Hmm. So there it is Lightbriting Test it out. Let me know. Let Puppyfractic know too – how you get on in the comments below Feel free to share Google photos links or whatever But remember, as with any technique, there are no guarantees it will work the same for you As it has for us.. due to a multitude of different environmental factors Both in what caused your yellowing and this method of fixing it Alright, now huge thanks as well, to the paradox And to Gargle Bob, Superingo, Gaz Marshall, and all my Patreons for their help with this experiment Thank you too if you become a supporter Subscribe or just do any of those small things that helped me keep making these videos for you What do you think of lightbrighting? And our hypothesis and test results? Is this the new light of your life? Or has it just clouded your day? Comment below and Cheerio!

100 thoughts to “Retrobrighting with just Sun? Read FAQ! 👇”

  1. I wrote a guide on how to retr0bright your own stuff, using a simple haircare product and some clingwrap (and time and UV-radiation):
    https://www.instructables.com/id/Retr0bright-how-to-turn-a-yellow-Gameboy-white-aga/
    I don't want to steal your thunder, your video is an excellent resource, I just wanted to share that there's a fairly easy method to do this. I think there are millions and millions of attic treasure troves out there, that deserve some 8-bit love <3

  2. This is some of the worst advice I've seen. There's a chemical reaction that is the reason UV+hydrogen peroxide fixes the color. You need the HP catalyst to actually retrobrite stuff without damaging it. Direct UV will fuck up the plastic and make it brittle. Do not do this.

  3. >direct U/V
    >no catalyst
    You're going to be responsible for so many ruined consoles and computers, dude.

  4. Talk to a Breyer model horse collector, and they’ll tell you that if your model horse has gone yellow, leaving it out in the sun will reverse the problem. That’s been known for quite a while (the plastic Breyer uses is cellulose acetate). So I’ve known about this from the plastic horse world for a while, but as the plastics are different, I assumed the chemistry would be. Seemingly not.

  5. This what I do with my various collectable fashion dolls. They are from the 1960's up to the past 15 years. I use Oxy10 cream in a thin layer on the area of the doll which is yellowed or stained, then lay the affected piece on the windowsill in the sunlight. I check it every couple of days until it's the colour I want.

  6. Yeah… this doesn't work. You're actually changing the chemistry of the plastic and damaging your hardware.

  7. Might give this a go with a pair of old pc speakers. a pair of juster multimedia speakers model ac-691n, I'll probably take them apart though for this just so i don't have too worry about moisture or them getting stolen from my balcony.

  8. If you're looking for a better translator than google, try out DeepL translator. It really is impressive in it's accuracy.

  9. LOL. If this were true, I should have the clearest car headlights from being outside in the sun. But instead I have yellowed headlights, and getting more yellow as they get older. Oh wait I'll just set them out in the sun, that will fix them. HaHa.

  10. Just tried this on my Atari 800XL. Noticable difference after 6 hours glorious sunshine. What a discovery!

  11. I am wondering if this will work on Commodore 64 breadbins… I've got one that was damaged in shipping so I may try it on that and do a video of the results.

  12. Just wanted to say I've come over form My Mate Vince's channel and you're videos are amazing plus he was right you're voice is booming and calming

  13. I tried this on my Nes that I Retr0brighted a few years back that slightly started to turn yellow again and it really made a difference only after 6 hours! Thank you!

  14. Well… Hamburger is the right translation, because we have a state that's called Hamburg and people living there are called Hamburger (which is plural as well) 😆

  15. It's true that glass filters out some light waves. But also I've seen many things bleaching in the sun at home, so…

  16. You told the secret insiders know for years! Damn! The whole chemicals crap is only used to reduce the a mount of time to bleech it via sun! The used procedure with all that cremes, toxic chemicals are only "turbo" features in the attempt to get a good result in a very short timeframe. The backside is – and that is something I already told for years but people do not listen and have it's own sight of the universe – that all these "helpers" do not stop it's chemical process and some kind of re-yellow returns quicker and a broken surface is the outcome which seems to be not glossy after a while. Pure sunlight was the solution all the time – bad you told everyone! My stocks in peroxid companies is most likely decreasing quickly as I do not earn money anymore by all these guys having used the method even told it is crap… ;-(

  17. I've been trying this with a couple of keyboards, and Atari TT one and an Acorn RiscPC one. The results really do depend upon the plastic. The Acorn keyboard has been bleaching nicely. Even in Britain after a few days of "solar brightening" the yellowing is almost gone. On the Atari keyboard it's a different matter. I'd previously retro-brightened the case but the I didn't want to pull the keycaps off as they're too easy to break. Anyway, the main keyboard is one plastic formula, the function keys another and the case a third. The results have been that the case is re-yellowing in the sunlight, the function keys have brightened but the main keyboard hasn't really changed.

  18. I got an A1200 yesterday, and the colour of the plastic is practically like new. It was used for a long time in an office with no sunlight coming in, and no fluorescent light (old fashioned light bulbs). It has been sitting in a dark attic for a few years after that. Without comparing it to an actual brand new system, I can't be sure how much it may have yellowed, but seeing it on its own, it could almost look like it was bought brand new in store last month.
    I will NOT be putting it outside in the sunlight.

  19. I use to remember when my cousin do the laundry for us in the Philippines that I cannot replicate how white she can make our school uniform. Doing that here in the US using dryer to dry clothes compared back then you hang clothes in direct sunlight. Btw I watch a couple of guys restoring old Jordan shoes with their DIY UV light box to whiten the white rubber on shoes 🙂

  20. Sunlight destroys ABS plastics if exposed for long time and high temperatures. More than peroxide does. Watch out!

  21. Incredible work. The solution is so simple, but it was just so counter-intuitive, because everyone seemed to think that the Sun was the main culprit. I love your scientific approach to this, much appreciated. I wish I had known this yesterday, when I bleached my C64 with good, although not perfect results. But now I can at least treat my precious Amiga more gently. I guess I can also re-yellow the C64 using my newfound knowledge, and then use the new method for a better, more stable result. Again, thank you for this.

  22. there are cases where the plastic yellowed inside their boxes unopened and having just sat for years in plastic protective bags while on store shelves. how do you explain that? simple. whats happening here is are temperatures and response of the fire retardant material used in the making of the plastic. coupled with the artificial lighting in the average home/store bleeding through the boxes and plastic protective bags.

  23. Awesome discovery thanks for sharing! Just posted my week and a half test on a slightly yellowed Sega Dreamcast and a very yellow SNES https://youtu.be/4eBynrpdLdk

  24. Extra Like for that Max Headroom clip. My brother had that demo on his C64 when we were kids back in the day

  25. After a couple of successful tests on yellowed CD case trays I left my BBC B case inside a sunny UK window and I’m happy with the results. These computers were only ever cream in colour, and mine was a pretty good one with little yellowing so only needed a little sunbathing to get it the same inside and out. I’ve done the top case now, just working on the bottom if the sun ever comes out again…

    My question is now how best do we store our vintage computers (or other plastic kit)? I’d always assumed it was daylight that yellowed them, so one should store them in their boxes in the dark. I think it is now pretty clear this is flawed thinking as they clearly yellow there. I’m still a little confused as to what exactly caused the yellowing, though it certainly looks like florescent and tungsten lighting may be much to blame. As such, other than avoiding those two, where is it best to keep our vintage computers from now on? On show fairly near a window so it just gets a very gentle dose of sun? I’ve already moved to all LED lighting now so hopefully that is kinder, but I’m still very curious as to what part of a typical room would best preserve the restored colour, and is this better than in-box storage?

    PS Thanks very much for publicising the idea. I’ve always steered clear of proper chemical ‘Retrobriting’ as it seems so risk prone, and this method has to be much safer (especially indoors as I did it).

  26. This makes a weird type of sense. I have an old RC toy from childhood that was left properly boxed up in the styrene packaging. ONE side has yellowed in complete darkness over 20+ years.

    Also, we were always told to close the piano lid to stop the keys yellowing. It also turns out that sunlight exposure reverses that.

  27. Currently trialling this with an ice white Apple Pro Keyboard (M7803) which has gone very yellow (seems to be very common with that model). After 2 days (~20 hours) of modest British sun it's already visibly better though a few more days needed yet I think.

  28. Good idea, but won't this just make the old plastic even more brittle… Sure I read someone else tried this recently and their case cracked not long after.

  29. 17:50 Puppyfractic actually had some valuable insight to share, but it was pitched too high for human hearing.

  30. Me : – oh cool, i have to try that on my famicom !
    "See a famicom photo result on the video"
    – yaaaayyy !

  31. I'm going to try this on some Altec Lansing computer speakers that have yellowed badly. Subscribed! (Your voice is awesome BTW)

  32. Jesus H Christ !!!!!!
    I thought i'd give this a try with an Atari ST original mouse, i put some black electrical tape on part of it to see if i could then see a difference after trying the good olde sun technique, now i didn't put it outside, i layed it in front of my window which only gets about 4-5 hours sunlight as the window is facing eastwards, anyway i left it there for 2 days with the sun coming and going with the clouds, so i'd say maybe it got approximately 3-5 hours of sun, on the second day i waited till the sun had stopped shining on my mouse as it moved more towards the west, then took it away from the window to inspect it.
    I removed the black electrical tape and as soon as i did that "HELL NOOOOO !!!!!!", i instantly saw the mouse had lightened with still the obvious yellowing present from where i removed the tape.
    The mouse is now going to sit in my window until i'm satisfied with it, and also until the yellowing from where the tape was has gone, you are sir a genius and a god send for all us retro computer nutters lol.
    I tell you what, you've started something now as i'm now gonna end up putting allsorts of stuff in my window now in the coming months ahead, god knows what the neighbours are gonna think lol, thanks Perifratic (aka Christian) 🙂

  33. I am totally going to try this on some of my gear, I have a really yellowed NES controller that I can try this on. Thank you so much for sharing this information, now I don't have to by all this gear and chemicals which can get expensive, the sun is FREE!!!

  34. My super nes was all yellow in the half bottom, i use peroxide with pure sun, without disarming the console, and all went perfect !!. Even you can leave your electronics for several days, it is not supposed to work under sun directly because of the heating, even more considering the years of work. Didn't know the sun could de yellow your plastics.

  35. Yes…succes!
    Put my classic II plastic parts in the sun for some time now and I can confirm that this method does work! NO CHEMICALS NEEDED!
    Thanks to you….and the German Guy…..

  36. Mostly indoors and through glass you will get a lot of infrared light, or heat. Ultraviolet light is filtered by most glass. So perhaps the yellowing is caused mostly by the heat and the brightening is caused by the UV light even in the daylight?

  37. Does the UK (specifically wales!) Have enough Sunlight? I have an ancient PC that i wish to restore (aesthetically as well as functionally) The function part is fairly straightforward and easily achievable (E Bay for second hand ..and some old/new parts) but cases. keyboards and even Mice is another kettle of fish…or should that read another UV oven of fish? whatever….cool experiment …but not that cool as sunlight isn't! PS I love my Commodore too, just making my own mini 'Home computing' museum complete!

  38. This video is a revelation! My yellow Dreamcast is back to it's white color! I also deyellowed my PS2 controllers. Thanks Mr Fractic!

  39. So the best brightening rig would be a box that contains a turntable and a bright mercury discharge lamp that is unshielded, so it will heat up the box and flood it with UVA and UVB rays. Much like a large microwave oven.

    Shouldn't even be very difficult to build that if you have a lot of stuff to de-yellow. Or you can just hang your keyboard off the clothes line for a week.

  40. Hi bud, I'm going to be trying this tomorrow with a badly discoloured Gameboy DMG shell, but I was wondering something.

    In the vid you seem to believe that it's the combination of UVA & UVB radiation in the suns rays that actually have the effect that we're looking for. This makes some sense given that all but the more recent windows are designed to filter out UVA as you showed on your hypothesis diagram.

    My question is, have you tried to replicate this effect indoors? I've been looking for light bulbs designed to generate UVA & UVB and keep coming back to reptile bulbs. I'm wondering if using a few of these to create a "Lightbrighting Box" ™ could enhance the effects and even out the light distribution.

    Obviously this theory only works if you and the professors believe it is these specific radiation bands that are causing the Lightbrighting effect as I think pretty much anything else in the suns light spectrum isn't going to be replicable at home.

    Love to know your thoughts on the subject before I go out and by a small zoo's worth of reptile lamps lol.

  41. Thank you for sharing your discovery. I want to try this out, but I live in Florida where it is currently 102 F and am worried that leaving my computer out in directly sunlight for 8 hours would melt the components or cause them to overheat (especially a monitor!). Have others tried this in hot locations? Any adverse effects? Thank you!

  42. You might reach out to someone to print out a new set of keyboard keys to replaced the damaged keys.

  43. I have bleached my 1541 using just light, before (I am a german user in the forum you found).
    Btw: That's not an Amiga 2000's, but a way more rare Amiga 4000 keyboard you sacrificed there 🙁

  44. Hi there, i want to share my thoughts with you. As a child. when we went to holdiday by car, i often had a comic book with me during the travell. I once forgotten it behind the rear-glas and a few days later it was so bright that you even could not regognize the cover any more. So i ask myself, if putting the things behind the rear or frontglas of a car will speed things up ? Greetz from Germany

  45. Hi Chris! I mentioned you in my latest video – https://youtu.be/vfa2qTpDTjw It is about painting plastic parts and a short look at bleaching with your sun light method. I hope this is ok for you! Take a look at it! Many greetings, Doc64!

  46. Did you already see this video by Odd Tinkering? There's a nice retrobrighting method used, and it looks quite fast, too…

    https://youtu.be/b0yHp70LcuU?t=454

  47. I put an Atari SM124 monitor behind a window for a couple of months now and although this sounds very subjective, I'm pretty sure the yellowing has gone away "considerably". The hypothesis (not theory mind you 🙂 ) just got a little more tested. Now putting a Megafile30 HDD in the sun outside…

  48. Just found this video and can't wait to try it! One question though: My SNES is only partially discoloured (two parts seemed particularly subjective to yellowing) and if the whole thing brightens equally, I'm still left with a different shades of gray. Is it reasonable to assume that the parts that were subject to yellowing originally will also be the ones that will brighten fastest?

  49. Light-Brighting. Who would have thought?? I am in Brisbane Australia and fortunately in the Autumn to Spring months the Sun isn't quite so insanely hot that I can give this a go without likely melting anything. I have had some very good success with a Apple 2e cover and about 2 days worth of sunlight. I'll give it another day to get rid of the remaining yellowing but here is a photo showing the difference to the case. It does look even better than the camera can show. http://tinypic.com/view.php?pic=2nrjzi0&s=9 What is so fantastic about this is De-Yellowing without the awful marbling effect is now possible. Thanks massively for thinking outside the box to come up with this solution. Here's a before photo, doesn't show the yellowing very well but does show that there was even colouring across the unit. http://tinypic.com/view.php?pic=2qb6tzc&s=9

  50. Just want to say thanks again for bringing this up to attention, and for the detailed FAQ that you've put extra and continuous work into!

  51. I have a SNES where the top yellowed. This SNES was in a cool basement all it's life with not even diffused low sunlight, and only lighting was old incandescent bulbs but was covered when not used. Basement was always fairly cool and not hot even in the summer. The only variable that makes.sense is maybe just the air

  52. Wrong.

    Plastics from the late 1970- through 1990's contained Bromine as a fire preventative. Bromine reacts with oxygen and browns or yellows with age. Sunshine causes UVA and UBB damage which also acts on the bromine to whiten it via breakdown of oxygen-hydrogen into ozone. Contaminates in the atmosphere clouds haze, smoke, co2, can dirty plastics. Ozone does the cleaning action. This is why the Retrobrite process works, it breaks down the hydrogen peroxide into ozone under sunlight. Sunlight alone will not clean this type of plastic, nor is Retrobrite a one shot process. Because plastics contain Bromine, it will yellow over the life of the plastic, so will need cleaning every few years.

  53. I found an old Nerf Whiteout blaster in the shed the other day. It had yellowed really badly, so I thought I'd give this a go. I left it outside for a few hours (on Winter Solstice so there was less light than normal) and it went completely white again by the end of the day on the side I left exposed to the sun! So I finished it off the following day and it looks new again. It's incredible!

  54. This is good to know, i put my recently bought yellowed Nes top case in the sun now. In my room under an open window. Hopefully this helps. I have to wait putting it outside because i have people walking here.

  55. The hot Texas sun wins again! Look how brilliant this keyboard looks.

    https://twitter.com/ChrisKewlTV/status/1151932491407732736

    If you were still on Twitter I would've tagged ya. 🙂

    P.S. My previous tries on this post seemed to fail, trying again.

  56. so I’ve got a vic 20 with really bad yellowing (it’s almost brown!) in one spot but the rest is pretty average. should I mask everything but that section?

  57. This would also work with a thin sheet of clear plastic as rain cover as it supposedly passes UVA/UVB light? Grow houses use plastic windows for this reason.

  58. Can anyone tell me if this works, or should work, if you covered it with a clear plastic bag? I have some units that it would be impractical to remove the covers, but am worried that a sudden rain storm could destroy them if left out naked, so to speak.

  59. The heat from the sun is a little bit frightening. Doesn't it has some degradation effect over the plastic and the electronics itself?

  60. 'Hamburg' is one of the biggest cities in the north of germany, Hence the 'Hamburger' i.e. 'person or thing from Hamburg' 😂.
    It's notorious for shitty weather, so I imagine they were talking about the relative strengh of the sun in the north of germany vs. central and south germany.

    Fun fact: The Hamburger is allegedly called Hamburger because immigrants from Hamburg brought the recepie for the meat patty, then served in a roll, to america, where it evolved into the Hamburger we know today.

    Edit: BTW: There's a second thread on that topic on that forum with some logterm test results for this method.
    Someone was trying to test the effects of the traditional retrobright method and the assumption that sunlight caused yellowing. He sawed a commodore 64 mouse into pieces and retrobrighted one, layed one in the sun (expecting the yollowing to worsen) and exposed one to heat, but kept it in a dark environment. The last piece was kept as a refence piece in a drawer t room temp.
    To his amazement, while the retrobrighted piece was overbleached, the sun bleached piece returned to it's original color.
    He did revisit the pieces periodically and the sun bleached piece did show reyellowing, but didin't get as bad as it originally was, wich lines up with your own test results as well. He says the de-yellowing takes longer in subsequent treatments though.

  61. I absolutely love the music you have on your intro and throughout all of your videos. Keep up the great work 🙂

  62. Ok, now that the retrobright problem is over, find a way to definitively restore world peace ! :-DD

  63. @11:06 shouldn't it be 32 degrees Celsius instead of Fahrenheit? 🙂 0 degrees Celsius in California in probably April seems kinda weird, even with nowadays weather. 😉

  64. Please retrobrite that mac plus, its a platinum edition! You would be the first one to retrobrite one on youtube. Its a very amazing looking machine when done right!

  65. Intresting, thanks. Cheers from Poland. Tumorow i retro bright my philips green amiga crt monitor 😀 but i use sun + hydrogen + 80 *C worm water as alweys 😊

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