I guess you just have bad luck then. My Cerebros is still white, 2 and a half years later. LINK

 

Strange because I've absolutely no problem with the said whitening process, much less with 3% Hydrogen Peroxide solution.  

 

It was locked in a room have ZERO sun light and UV light, 100% dark room.

I think some of the brothers here also experience the same like mine. I do not think it is luck but it has something to do with the plastic quality.

I do not whiten my cerebros but try with the white leg of fortress max, white part of getaway.

All return to yellow after a while..

 

I have had great results with the 3% peroxide: used it on a G1 Groove, on Overlord's purple accessories and currently I am doing a Pretender Carnivac inner robot. No reversal of coloring on any of those figures.
The story about plastic becoming yellow due to 'oxidizing' is complete BS. It would mean that soaking plastic in peroxide would hasten the yellowing proces, which it obviously doesn't.
The yellowing is actually caused by a bad mixture of bromine (flame-******ant) in the plastic. UV light caused a reaction within the bromine, causing it to turn brown on the surface of the plastic.
Soaking the plastic in a peroxide solution and exposing that solution to UV light causes the exposed yellowed bromide molecules to oxidize.
Read this for the exact information on what happens.
I quote: The reaction of Bromine with oxygen is unique and is accelerated by UV light. Bromine molecules actually vibrate when exposed to UV light at around 300 to 350 nanometres in the UV-A spectrum. It is this vibration under UV light that causes the Bromine to become active and start to hunt for Oxygen atoms to share electrons with. Bromine has an odd number of electrons in it's outer shell (see the molecular diagrams lower down this article) and really wants to have an even number of electrons in the outer shell as this is a more stable state. This reaction with UV is bad news, as sunlight contains UV-A and UV-B light. Putting ABS plastic near a window is the worst thing that you could do, as it will make the case go yellow very quickly on the exposed side. Office fluorescent lighting also contains UV light so there really isn’t a hiding place for a computer case where it can be totally safe.

It’s not all bad news, however. The UV light that caused the yellowing can also be our friend in reversing the effect. We will be using the destabilising effect of UV light to destabilise and break the relatively weak, electron sharing co-ordinate bond between the Bromine and the Oxygen atoms, so that we can replace the Oxygen with a Hydrogen atom which has been formed from the breakdown of the Hydrogen Peroxide. This Hydrogen atom is positively charged and neutralises the free electron on the Bromine atom, thereby making it stable by giving the Bromine an even number of electrons in the outer shell; this is called reducing the oxidation state of the Bromine, causing the colour change we are looking for.

 

I went ahead and tried this with the chest piece of my Fort Max. . I used the 3% stuff and put it out in direct sunlight for 3-4 hours and it came out looking perfectly new! The only problem is the legs now look dull, so I'll eventually have to do them too.

It's amazing how bad the yellow chest piece made the figure look, and now it looks 100X better!

 

I too have tried this process with mixed results.(I posted early in this thread) They always initially work, but with the three G1 Jetfires I did, all are now yellow again. No sunlight or smoke/dirt have touched them since I did the process. But I also have had success with over a half a dozen other figures with them still being white, including a G1 Ratchet, G1 Red Alert, 3 minispies, and a few others. I think the plastic used by Bandi on the Jetfires must have something to do with it, but not sure.

 

I soaked a few Lego pieces with my Jetfire parts, too, and those re-yellowed as well. I don't think the plastic type matters as much as how long the parts are soaked. I had to soak most of my parts over a couple of weeks. Others who haven't had parts re-yellow seem to have soaked parts in less time.


What brand of 3% peroxide did everyone use? I went with Walmart brand.

 

I used my 16% solution for about 3 hours on my Hydra chest. Came out pretty good. Lightened him up. He was in there a little bit too long though, as he was just starting to acquire a bleaching effect in certain areas. Doesn't look bad though, and the figure is already beat up anyways.

 

was there a thread recently? can't seem to find it  
anyways here's pictures of my jetfire I want to threat...
what are the names for dutch version of the used ingredients?
http://www.tfw2005.com/boards/radicons-customs/408676-g1-jetfire-gets-few-upgrades-wip-2.html

 

Since it's been proven that treated toys yellow after a while, the next interesting question to be answered is what type of clear coat would slow down the re-yellowing.

 

http://i29.tinypic.com/2lszf3o.jpg

Its a repaint issue of Ratchet, LMAO

 

Here is the one I just did... NOTE: This is not HP.. this is a new product I am working on. Total time in solution is 20 min. No sunlight. Does not harm the red paint or fade it. So far items done in the past are still white. I changed his "antenna" out with one from another Jetfire I had for parts. Other than that he is all original.

 

I'm interested and impressed. Do you mind sharing this formula?

 

Wow that is amazing nice work! Did you dip the whole thing in or just parts?

 

Right now I can't... the company I am working for to design it wants to try and patent it. Once they file I can give it out. However, even if I could give it to you, it is not made from items you can buy at a store and requires very expensive lab equipment to make.

 

Just the parts... Our solution will turn the black parts white. I have a long thread on the yojoe forum if you want to see a bunch more things I have used it on.

 

So this doesn't remove the yellowing. It just bleaches the plastic? Do all colored parts turn white?

 

It removes the yellowing but can attack some colored plastics. Some plastics it removes the yellowing without harming the color. It depends on what was used to color the plastic. Some black plastics it has been tested on do not turn white. However, the black plastic on the Jetfire will turn white.

 

WOW! That looks fantastic. Please patent it and sell it in tubs  

If the patent thing doesn't work please share it with us through a webshop of somekind. I'd love to get better results.

iDD

 

Sure thing... even if the patent does not go through we can still make and sell it. We just can't protect it.