what is the type of peroxide used in .......

[shabbychicdee]

bleaching discolored play sets back to there glory
is it a certain percentage type of peroxide used? hair peroxide? food peroxide

please and thank you 

[Oneleo1]

I think it's the 3% peroxide solution that you find in the pharmacy department It comes in a brown bottle, normally with a white cap.

[hathorcat]

Here are emerys instructions...http://www.mlparena.com/Forums/viewtopic/t=210048/postdays=0/postorder=asc/start=0.html

These instructions are from G1 Joe/Transformer collectors. Also this particular instruction works best for smaller parts and is thanks to an old link from Gizmo. Although this information says 6% I am reasonably certain as OL1 says most people use 3%.

"- Get a clear glass jar with a seal tight lid (I use an mayonnaise jar like this one with the label removed)

- Buy a Jar of Hydrogen Peroxide with at least 6% w/v from a Pharmacy or Super Market (Pharmacy is more reliable)

- Fill the glass container with the appropriate volume of Hydgrogen Peroxide depending on the size of the yellowed piece.

- Once the piece is submerged, expose the jar to sunlight for a few days (oh the irony! ) until the plastic color is 'corrected' to your satisfaction. During this process you will see thousands of small bubbles covering the surface of the plastic - This is the Hydrogen Peroxide at work.

Advice: Try not to have too many pieces of plastic in one jar. The crowding of pieces slows the process as they shield each other from sunlight.

Note 1: Some plastics are more successful at regaining their color than others but something that seems consistent from my experience is that there is always a considerable improvement. It seems that different plastic types regain their colors at different rates - The level of yellowing is also a factor in the length of the submerged time period.

Warning: Hydrogen Peroxide is corrosive to metal. However from what's available in retail, the level of concentration is so low that it seems negligible. I have not seen any corrosion in metal rods and pins joining plastic parts even after being submerged for a couple of weeks.

Warning 2: Although most painted parts will not be affected by the Hydrogen Peroxide, there is documentation that some do. Toys with painted detailing which fades with exposure to the Hydrogen Peroxide includes: AM Megatron (Purple).

VERY IMPORTANT WARNING: Hydrogen Peroxide is also toxic so try to avoid exposing your skin to it. Try to use gloves and if it goes on your skin, wash the affected area immediately.

Note 2: I have used this process in at least half a dozen toys without any ill effects to the plastic even after more than a couple of weeks submerged. It's been about a year's time since my first attempt and the plastic of the toy in question is still fine. However regardless of success, the plastic is still vulnerable to yellowing again if exposed to UV rays because that's the nature of the plastic.

Disclaimer: Although I have been successful with several toys using this procedure and I have not observed any ill effects on the plastic - there is no guarantee that it will work for you and there is always the possibility that some plastics may not react well to the Hydrogen Peroxide so proceed at your own risk."

[HavACrumpet452]

I use 3% on ponies. Food grade comes as high as 35% and I think that might eat a pony. Not to mention at that percent you need gloves and careful handling.

[shabbychicdee]

oh thanks guys your the best
i will try them on the uk school desk and baby miss piggy's McD car, both have gone orange so if i slip up i won't be heart broken.
but question how do i do say.....dream castle gulp  il have to do turrets only, is there a cream maybe i can use
right of to stalk tradme hair solution's

[partypony566]

Cat thanks for the info, I just was wondering this myself, as I want to bleach my poor brown Starshine

[hathorcat]

oh thanks guys your the best
i will try them on the uk school desk and baby miss piggy's McD car, both have gone orange so if i slip up i won't be heart broken.
but question how do i do say.....dream castle gulp  il have to do turrets only, is there a cream maybe i can use
right of to stalk tradme hair solution's

I think in emerys post she uses a cream that she "paints" on - you could try and track that down.

[Ice_gypsy]

but How does this work? Peroxide breaks down in light

[hathorcat]

but How does this work? Peroxide breaks down in light

Its because of the bromine - in order to stabilise and reduce the breakdown of the bromine which is what causes the yellowing, you need hydrogen hence the addition of H202 in H20 in which encourages break down.