Whitening yellowed toys with Hydrogen Peroxide

[Megatrons Cannon]

I have bathed so many Jetfires in H2O2, gotta love that stuff.

[Eruntalon]

I thought that I would bring it to everyone's attention that the Fortress Maximus parts that I kept which I used Hydrogen Peroxide on (I sold the bulk of the toy on ebay) have had some of the yellow return after 2 years of being in storage.

I'll quote myself in this thread:

http://www.otca.com.au/boards/showth...943#post330943

Hi, I just wonder after so many months of your whitening work n FM. Does the yellowing come back?

I ask so as after I have whitening my Grand Maximus, the yellowing returns after 1 to 2 months..it is very sad..

Sorry for the belated reply to your question.

Yes, some of the yellow has returned in part. After two years in storage the whitening process is only a temporary solution. Although the yellowing is not like it was before, I would say as a rough estimate that the fort max parts I still have (I ended up selling the one in the photos except for a few parts) about 25 percent of the yellow has returned. And this is after storage in a dark cupboard!

[kup]

The same thing happened to my G1 Vroom. After the H2O2 it came out a minty white. I put it in a place where it was in complete darkness, away from light, humidity, heat and humanity but it still re-yellowed!

It seems that it is just the 'nature' of the plastic to yellow. You can only 'reset it' with the H2O2 but that won't prevent the yellow from coming back.

[theshape]

Used h2o2 paste for the first time on the weekend for my slightly yellowed great shot. Quite impressed . Virtually all the yellowing gone after 2 days. Will wait and see how long it lasts

[VERT]

My getaway has yellowed again after a year. Been in darkness too. Sad he was looking so good.:-(

[Demonac]

I wonder how many people will use this stuff to whiten a toy then sell it to an unsuspecting buyer.

[kup]

I wonder how many people will use this stuff to whiten a toy then sell it to an unsuspecting buyer.

Is there a negative of that though? The H2O2 fully reverses the yellowing to a mint state, the problem is that the plastic by it's 'nature' is prone to yellowing unless it is kept in a perfect environment for it.

[Skullcruncher]

My getaway has yellowed again after a year. Been in darkness too. Sad he was looking so good.:-(

I had the same thing happen here, he even looks more yellowed than I remember. Thinking I should just sell him and forget he exists.

[kup]

I had the same thing happen here, he even looks more yellowed than I remember. Thinking I should just sell him and forget he exists.

Clearly sunlight is not the only factor that causes yellowing.

[5FDP]

Most of the senior OTCA members have seen this already but some of the best articles I have seen written on the subject of toy degradation due to sunlight and other factors was posted up on Fred's Transformers Variants website. Worth a read IMO.