Yellowing toys

Discussion in 'Transformers Toy Discussion' started by Deshma, Apr 9, 2009.

  1. Deshma

    Deshma Banned

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    Don't know whether to post this in Radicons or here, so I'll post here and the mods can move it at leisure I suppose.

    Two questions:

    1: If a toy is already yellowed, can the process be reversed i.e. cleaning, bleaching etc. Anything other than repainting the damn thing.

    2: How do you prevent this in the future, is there a special lighting or whatever?

    Help, as usual is much appreciated!
     
  2. Grimwing

    Grimwing Scientist Supreme

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  3. thenatureboywoo

    thenatureboywoo Veteran

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  4. Grimwing

    Grimwing Scientist Supreme

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    So hydrogen peroxide solution to eat a micro layer of the the yellowed plastic.
    Thus exposing previously unexposed air/ultra violet light plastics.

    Then use a UV protecting spray on those surfaces. So you won't need to repeat the process again in a few more years.
     
  5. Deshma

    Deshma Banned

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    Where can I get some UV protecting spray?

    Also this spray won't effect the condition of the figures will it?
     
  6. Deshma

    Deshma Banned

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    Hmm...interesting advice in those links.

    I believe I will attempt to experiment with this, but with the %30 peroxide in a larger clear container, and the figure or parts on a screen mounted above it while its sealed. It seems that the better results come from not immersing it but just having the reaction occur around it.
     
  7. Grimlocka go-go

    Grimlocka go-go Back from the Dead TFW2005 Supporter

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    From what i remember it doesn't so much as eat the outer layer of plastic, because it didn't effect the paint on parts such as jetfires wings, but it does invovle a chemical reaction that removes the minerals/particles whatever that cause the yellow color.

    I have also tested using this method, and it works amazing, and so far have not had a single difficulty or any degredation or brittleness with the plastics.
     
  8. Grimwing

    Grimwing Scientist Supreme

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    You'll want some Krylon UV resistant clear
    Krylon: The Spray Paint Leader in Color, Innovation, and Inspiration

    krylon uv resistant clear - Google Product Search

    It really won't hurt it. Since it is A.) Clear and B.) non corrosive But wait until it dries so you don't risk smudgeing the coat.
    You will want to avoid spaying metal parts as much as possible.
     
  9. RoboticPlanet

    RoboticPlanet Exclusively Exclusive

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    Not exactly. The reason the plastics are yellowed is because oxygen binds to the plastic's surface. The H202 in the presence of UV radiation is able to tear off those oxygens. Once de-yellowed, the plastic is essentially in the same chemical and physical state it was prior to yellowing. There isn't any "micro-layer" of plastic removed. This is why paint and stickers aren't affected much (or at all?) and their aren't any signs of the plastic becoming brittle.
     
  10. MegaMoonMan

    MegaMoonMan www.megamoonman.com TFW2005 Supporter

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    The H2O2-UV process is truly a miracle for vintage toy collectors. It works like a charm and has no known side effects.
     
  11. RoboticPlanet

    RoboticPlanet Exclusively Exclusive

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    Also, the Amiga computer nerds who discovered process collaboratively developed a gel they call "RetroBrite" that you can put on large areas, like Fort Max. I have a GI Joe Defiant shuttle I plan to try it on some day.

    Retr0Bright Retr0Bright Gel
     
  12. Grimwing

    Grimwing Scientist Supreme

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    Oh thanks. Very well explained in short.
     
  13. Orbital

    Orbital Well-Known Member

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    Question about yellowing. Does it affect all transformers toys or mainly the G1&G2 line?
    or does it affect every line including the movie and Animated verse? and if yes to the lather, why has hasbro/takaratomy not fixed this or care? lol
    cheers.
     
  14. Paladine

    Paladine Well-Known Member

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    It affects all toy lines. The yellowing problem exascerbates with age, so we see it more often in the G1 line. I personally have a RID Mach Alert that is yellowing, and he's only 8 years old now.

    The problem is due to chemistry, and Hasbro can't fix that! Just keep them out of the sun and out of extreme heat and you should be OK.
     
  15. Th0r4z1n3

    Th0r4z1n3 The F*cking Lizard King! Veteran

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    has anybody tried this with just regular peroxide that you get from the store? just curious, i just got a g1 ramjet that i'm considering trying it on
     

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