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Thread: Has anyone seen this!!! (whitening yellowed plastics)

  1. #21
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    Might be needing some new stickers there, Dogfight! (:


    Eagerly waiting for Masterpiece Meister

  2. #22
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    Quote Originally Posted by griffin View Post
    I'd be worried about what it does long-term to the integrity of the plastic itself. Bleach is pretty harsh stuff, it could well be breaking down the bonds in the plastic, making it brittle or crumble away over time. If it doesn't affect the integrity of the plastic's molecular structure, it'd be a great fix. But if it does weaken the plastic, this 'short term fix' will be the scourge of the second hand market. You'll get dealers cleaning up their toys, get 'Mint' prices, and the toys crumble and break within a year of it being sold.
    I share this concern also. I do look forward into seeing the end results however.

    I wonder if just wiping the figure over with peroxide would work (edit- now ive read the article a bit more i dont think so)- this way you could avoid the prolonged exposure to the chemical and perhaps avoid risking the breakdown of the figures structure.
    Last edited by Vector Sigma 13; 19th December 2008 at 07:02 AM.
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  3. #23
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    My concern would be that sharp edges in details might loose their edge and become rounded and make the figure look "melted".

    See what happens anyway. I have a g1 breakdown I could try.....
    Code:
    O o 
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    |      IMMA FIRIN MA LAZAR!!!
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  4. #24
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    Kup, I eagerly await your test results!

    ***

    I have little factual basis for saying the following, but I don't think the H2O2 is as corrosive as is suspected. From the other site's photos, it seems to only remove the yellowing but leave other colours intact. For example the black and red stipes on Jetfire's chest piece remained in their original colours.

    Bleach or something more corrosive would have removed all colour quite completely. I think yellowing is a chemical reaction on the surface of the plastic and all the H2O2 does is produce or reverse the chemical reaction thus turning it back into its original colour. At the worse, it would thin out the plastic by a very minute amount.

    ***

    I do share the concern that unethical sellers would benefit greatly from this and it is something to be aware of for people buying vintage TFs. However, if its a toy I already own, there is little to lose to subject it to treatment. If it turns yellow again after a year, it would only have returned to its original yellowed state anyhow.

    I'm hoping to try this on my yellowed trypticon and jetfire parts!

  5. #25
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    Well its been a sunny day, So i bought meself a bottle of hydrogen peroxide and dipped one of my worse for wear TFs - RiD Prowl. Here's a pic of him when he first arrived after I migrated him here just this March '08. If he proves to improve with the treatment.... then my Actionmaster Megs will be next.

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  6. #26
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    I've just read through the entire post on the other side and it all sounds rosy. He whitened his stuff about 6 months ago and they are still fine now.

    gosh, I'm really quite excited by this since I discovered that a few of my vintage TFs turned a tad off white when I visited them in Singapore recently.

  7. #27
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    Liege,

    Did you disasemble Prowl? I am not sure how the the rubber and other non plastic parts would react with the Hydrogen Peroxide.

    Also where did you buy it? I only found mine at the Chemist. Woolworth didn't have any.

    Just a couple more hours and I can go home to see what Happened with Dogfight.

    Hopefully he hasn't been turned into a Blue milkshake

  8. #28
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    Quote Originally Posted by kup View Post
    Liege,

    Did you disasemble Prowl? I am not sure how the the rubber and other non plastic parts would react with the Hydrogen Peroxide.
    According to the site, it does damage or have an effect on rubber tyres and clear plastic parts.

  9. #29
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    I got home and had a look at Dogfight. I am sorry to say that the changes were inconsequential (if any)

    He is the same as before despite being exposed to sunlight for a full day. I put the parts back in the jar just in case it takes it a little longer and will see how it goes tomorrow.

    So far I have noticed that the plastic integrity has not been affected at all and there is absolutely no effect on the stickers.

  10. #30
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    [QUOTE=kup;70897]
    Also where did you buy it? I only found mine at the Chemist. Woolworth didn't have any.


    i got mine from woolworths it was in the medicine aisle with panadol & bandaids the 3% stuff that is and it seems to working a treat

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