(Topic ID: 128481)

Say Goodbye to Old Yellowed Plastics!


By Eddie

4 years ago



Topic Stats

  • 203 posts
  • 87 Pinsiders participating
  • Latest reply 2 years ago by Bax1
  • Topic is favorited by 203 Pinsiders

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    There are 203 posts in this topic. You are on page 1 of 5.
    53
    #1 4 years ago

    I found a way to make old Yellowed Plastics ,Ramps etc Clear again.

    Maybe posted here before but not sure I haven't searched.

    You have all been there. You have Yellowed plastic and all the cleaners on Earth do nothing but clean off dirt and old Nicotine but they are still yellowed. Thats because its a chemical change from the Fire retardant used in plastics in combo with UV light.

    The Solution? A Peroxide Sunbath.

    Place your piece in a Clear container and fill with Peroxide to cover item then cover seal with seran wrap and leave in the Sunlight or a UV lamp for a few days and thats it.

    Don't believe it below are pics after the bath.

    Both pieces are from A STTNG that I am restoring for a client I used the one on the right to test the theory and you can see the results. I left it in the sun last weekend before I left my house and upon returning this weekend this is what I was greeted with. A perfectly clear piece.

    Original pieces as removed from machine.

    67.jpg

    Peroxide bath in ziplock bag

    23.jpg

    Results on right.

    6.jpg

    7.jpg

    Yellowed Shuttle

    8.jpg

    Peroxide bath

    24.jpg

    Decals removed after bath results on left.

    30.jpg

    Restored and redecaled and painted Shuttle

    47.jpg

    #2 4 years ago

    Very nice indeed. I'll have to try that on some older Bally SS game plastics.

    #3 4 years ago

    What strength solution of hydrogen peroxide are you using?

    #4 4 years ago

    Doesn't solve the issue with stuff that has graphics on it, unfortunately. That's the big problem except for ramps that haven't been reproed but have decals available.

    This has been around for years...if you put in an oxygen based accelerant, this is effectively the "retrobrite" process..

    #5 4 years ago

    Awesome, thanks for the tip!

    #6 4 years ago
    Quoted from reynolds531:

    What strength solution of hydrogen peroxide are you using?

    My question too.

    #7 4 years ago

    Does the plastic otherwise chemically react with the peroxide, become brittle, soft, other?

    #8 4 years ago

    wow! thanks for sharing!

    #9 4 years ago

    yep thanks.. i hate that yellowed plastic ramp /or anything look..

    #10 4 years ago

    Can you use this with silkscreened plastics?

    #11 4 years ago

    works great on TEETH too

    #13 4 years ago

    Frax is correct this is a simplified retrobrite procedure.

    So far I have used peroxide from different places just grabbed whatever was on the shelf so I can't say what the % is.

    So far they have all worked.

    The reason I left the decals on the shuttle is because I was awaiting a new one and a new set of decals. I was just testing the old shuttle so I really didn't care about the decals.

    I would suggest removing decals first and as for screened plastics I haven't tried them yet but will.

    I don't see it affecting the screening as this procedure just reverts the chemical process that caused the yellowing to begin with within the plastic itself.

    As you can see the shuttle paint was not affected at all.

    I know this technique can work on some painted plastics without issue such as old yellowed pop caps

    However there is a possibility on some plastics that they may indeed become brittle not so much of a problem with the clear plastics.

    I say play around with old broken plastics and use them as samples before trying it on plastics you are trying to restore.

    #14 4 years ago

    I would love to see if this works on screened plastics.

    #15 4 years ago

    This is amazing. Could save people hundreds restoring old plastics rather than having to purchase new ones. Thanks for the tip. I have a black knight with yellowed plastics and new CPR playfield. I may try this with my screened plastics because I'm going to have to get new ones anyway. The yellowed ones are unacceptable against new playfield. I'll post results.

    #16 4 years ago

    thanks for the infos!

    i've been searching for years for lane guide with the bally logo on it for my game because they are yellow.

    my search is over, i'm gonna try that tomorrow.

    #17 4 years ago

    Wow that's a great process thanks!

    #18 4 years ago

    Wow, great idea. That would work great on my Bi-plane in IJ. Most peoples are no longer white and rather yellow.

    #19 4 years ago

    The stuff is cheap enough (assuming the 3% formula is the right one) http://www.walgreens.com/store/c/walgreens-hydrogen-peroxide-3-topical-solution-usp/ID=prod6056573-product

    3 bucks for 1/2 gallon. , for 6 bucks one should be able to clear up an F-14 dome!

    Eddie, is it only good for 1 use, or can it be used a few times?

    #20 4 years ago
    Quoted from dozer1:

    The stuff is cheap enough (assuming the 3% formula is the right one) http://www.walgreens.com/store/c/walgreens-hydrogen-peroxide-3-topical-solution-usp/ID=prod6056573-product
    3 bucks for 1/2 gallon. , for 6 bucks one should be able to clear up an F-14 dome!
    Eddie, is it only good for 1 use, or can it be used a few times?

    Not sure never tried to save the peroxide But I don't see why it wouldn't be good for more than one use.

    Remember you need to get the part completely even in the sun or under a UV lamp or you may get uneven results.

    Also the process on average is about 24 hrs but that too may vary.

    #21 4 years ago

    All my yellowed platics that I want to try this on are screened. I can't wait to see results of that. This is a great thread. Thanks!

    #22 4 years ago

    Yeah... I've got some screened plastics from a 1967 Bally that are still fairly yellow after cleaning. I'd love to see if this works on screened pieces.

    #23 4 years ago

    Just got the results from the Romulan ship and damn it it worked!

    Why am I mad at that? because I want to paint it anyway.

    Before pic after a week of cleaning in a simple green and vinegar windex bath and Novus 2 you can still see the discoloration. Too bad my camera is so bad because the coloring is worse in real life. Note the greenish color and brownish splotches

    16.jpg

    Here is after the Peroxide + UV bath only 6 hrs. Note the even and bright color.

    4.jpg

    After I painted it but before I paint on the windows.

    5.jpg

    #24 4 years ago

    Eddie, have you tried the peroxide process on plastics with rivets and/or metal brackets permanently attached? I've got some yellowed plastics from Earthshaker that have several small brackets riveted to them. They would make a world of difference with the yellowing removed but not if the metal rusted or tarnished due to a chemical reaction with the peroxide..

    #25 4 years ago

    Nice job! Cant wait to try this my EM's.

    #26 4 years ago
    Quoted from jibmums:

    Eddie, have you tried the peroxide process on plastics with rivets and/or metal brackets permanently attached? I've got some yellowed plastics from Earthshaker that have several small brackets riveted to them. They would make a world of difference with the yellowing removed but not if the metal rusted or tarnished due to a chemical reaction with the peroxide..

    Don't think the peroxide would effect the metal. Through some brass screws or rivets in some peroxide by themselves as a test if you are leary.

    #27 4 years ago

    outstanding, be interesting to see varied results from different plastic, very interesting indeed....

    #28 4 years ago

    Great thread..

    This is great for the EM guys

    Thanks, i got a couple machines in que

    #29 4 years ago

    OP,

    Thanks for sharing, and the great examples!

    You have come a long way since your first pinball machine (RFM?)

    #30 4 years ago

    Great tip. Thanks

    #31 4 years ago

    Still waiting for someone with access to the sun to try some screened plastics.
    Texas has not seen the sun in weeks.

    #32 4 years ago

    Hmmmmm, Could this work on the yellowed cabinets? Brush on the peroxide in the sun? I know it wouldn't be soaking like the plastics but could it lighten up that nicotene staining?

    #33 4 years ago

    I have a bunch of Pioneer plastics that are badly yellowed. If they get ruined I have one less bin in my closet, if they work maybe I'll sell them for a few bucks. I'll try it this weekend.

    #34 4 years ago
    Quoted from KingNine:

    Hmmmmm, Could this work on the yellowed cabinets?

    No, this is a specific reaction to a chemical in the plastics that yellow in UV light.

    #35 4 years ago

    Following

    #36 4 years ago

    Very cool. Thanks for sharing.

    #37 4 years ago
    Quoted from Arcade:

    Still waiting for someone with access to the sun to try some screened plastics.
    Texas has not seen the sun in weeks.

    I actually did this a couple of years ago. While it was amazing for all the molded plastic toys in my STTNG, I had little success with clear plastics. Perhaps the plastic type varies, and some work while others don't. I had a spare really yellowed TOM sling plastic which I tried as an experiment. The art bleached out way before the yellowed plastic did anything good.

    BTW - here is the original thread with several photos and amazed people

    https://pinside.com/pinball/forum/topic/sttng-shuttle-craft-rehab

    #38 4 years ago

    Wikipedia has a bit of information...

    http://en.m.wikipedia.org/wiki/Retr0bright

    #39 4 years ago
    Quoted from caker137:

    I actually did this a couple of years ago. While it was amazing for all the molded plastic toys in my STTNG, I had little success with clear plastics. Perhaps the plastic type varies, and some work while others don't. I had a spare really yellowed TOM sling plastic which I tried as an experiment. The art bleached out way before the yellowed plastic did anything good.
    BTW - here is the original thread with several photos and amazed people
    https://pinside.com/pinball/forum/topic/sttng-shuttle-craft-rehab

    WOW just read your thread. What are the chances that we both tried this on a STTNG shuttle never seeing each others postings? Of all the plastics that could have been tried and we both used baggies.
    A ziplock bag was near me so I grabbed it. Truth is really stranger than fiction.

    #40 4 years ago

    I tried the peroxide treatment on some F-14 clear plastics without luck. I did not leave them out in the sun for as long as you. Will be trying again. Thanks for the before and after pictures!

    #41 4 years ago

    I would think that if you're serious about this that a UV lamp would get you better results than relying on sitting out in the sun, no?

    #42 4 years ago

    I want to try this on my clear F-14 beacon. Anyone else try it yet?

    #43 4 years ago

    Here is a great read on the subject. One thing that caught my eye is that the author likes 6-12% solution hydrogen peroxide for best results. http://www.exisle.net/mb/index.php?/topic/59657-de-yellowing-plastic-the-stain-isnt-permanent-after-all/

    #44 4 years ago

    Good news for Super Nintendo collectors.

    #45 4 years ago

    If the screened plastics get bleached out, couldn't you just flip them over so that the inks dont get hit with UV light?

    #46 4 years ago
    Quoted from Magic_Mike:

    Good news for Super Nintendo collectors.

    OFN for that group, really.... as in, that's where I know it from, and it's been pretty common knowledge in the console collector area for more than 5 years..

    Specifically, as far as game consoles are concerned, the process breaks down a fire retardant in the plastic that yellows.

    Will be waiting for someone to try this on screened plastics, especially if they use an accelerant.

    #47 4 years ago
    Quoted from Gorno:

    I want to try this on my clear F-14 beacon. Anyone else try it yet?

    Same here. Any suggestions on how ? Dont think you can buy a big clear bucket.

    #48 4 years ago

    In for updates on screened plastics. Nice work.

    #49 4 years ago
    Quoted from SUPERBEE:

    Same here. Any suggestions on how ? Dont think you can buy a big clear bucket.

    I wonder if there is a large freezer bag that could fit something that size.

    #50 4 years ago
    Quoted from SUPERBEE:

    Same here. Any suggestions on how ? Dont think you can buy a big clear bucket.

    An old 5 gallon fish tank?

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