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Re: Fixing yellowed Transformers with a little help from H2O2

PostPosted: Sun Jul 29, 2012 11:49 pm
by fenrir72
Pool maintenance stuff? Gotcha!

Re: Fixing yellowed Transformers with a little help from H2O2

PostPosted: Mon Jul 30, 2012 3:06 am
by alldarker
I've recently had great results on a slightly yellowed, but 100% complete Liokaiser.

Due to having stickered parts, I wasn't yet able to peroxide a couple of parts or the breast-beasts, but I've received some reprostickers which look pretty good, so they'll get a much needed bath somewhere this week (depending on the weather).

A good tip I read was to place the items + H2O2 solution in a (strong) zip-lock bag, instead of in a container. It allows for almost maximal exposure to UV-light, AND allows for easy turning of parts to the UV-source. I have to say, I also really like the tip to use a mirror to reflect some extra light back.

Re: Fixing yellowed Transformers with a little help from H2O2

PostPosted: Mon Jul 30, 2012 8:31 am
by El Duque
alldarker wrote:I've recently had great results on a slightly yellowed, but 100% complete Liokaiser.

Due to having stickered parts, I wasn't yet able to peroxide a couple of parts or the breast-beasts, but I've received some reprostickers which look pretty good, so they'll get a much needed bath somewhere this week (depending on the weather).

A good tip I read was to place the items + H2O2 solution in a (strong) zip-lock bag, instead of in a container. It allows for almost maximal exposure to UV-light, AND allows for easy turning of parts to the UV-source. I have to say, I also really like the tip to use a mirror to reflect some extra light back.


The mirror really helps in my experience. I'll have to try using a zip-lock, I can see how that would ensure maximum coverage.

Re: Fixing yellowed Transformers with a little help from H2O2

PostPosted: Mon Jul 30, 2012 8:34 am
by Seibertron
Not sure that using plastic containers is a good idea. Glass is the best option.

Wouldn't put zip loc bag out in sun with a chemical in it, especially on a mirror. Ziploc bag should get hot enough that it would melt and leak.

Glass containers (such as a cookie jar, baking glassware, etc) is most recommended.

Re: Fixing yellowed Transformers with a little help from H2O2

PostPosted: Mon Jul 30, 2012 9:07 am
by alldarker
Seibertron wrote:Not sure that using plastic containers is a good idea. Glass is the best option.

Wouldn't put zip loc bag out in sun with a chemical in it, especially on a mirror. Ziploc bag should get hot enough that it would melt and leak.

Glass containers (such as a cookie jar, baking glassware, etc) is most recommended.

I live in Northern Europe, where even on a sunny day, the temperature rarely passes 80 degrees :-(. There's literally no chance of zip-loc bags melting over here, even with a mirror under it. I use 3% peroxide, which shouldn't be nearly strong enough to disolve the plastic either. For my relatively high latitude, I'm thinking it's better to use a container that absorbs the least amount of the UV light as is possible, considering the strength of the sun's rays is less than it is at lower latitudes.

Of course, in countries (nearer the equator) with much stronger / hotter sunlight than we have in Northern Europe, you may very well be right in saying the use of plastic containers is a risk.

Re: Fixing yellowed Transformers with a little help from H2O2

PostPosted: Mon Jul 30, 2012 9:23 am
by El Duque
alldarker wrote:
Seibertron wrote:Not sure that using plastic containers is a good idea. Glass is the best option.

Wouldn't put zip loc bag out in sun with a chemical in it, especially on a mirror. Ziploc bag should get hot enough that it would melt and leak.

Glass containers (such as a cookie jar, baking glassware, etc) is most recommended.

I live in Northern Europe, where even on a sunny day, the temperature rarely passes 80 degrees :-(. There's literally no chance of zip-loc bags melting over here, even with a mirror under it. I use 3% peroxide, which shouldn't be nearly strong enough to disolve the plastic either. For my relatively high latitude, I'm thinking it's better to use a container that absorbs the least amount of the UV light as is possible, considering the strength of the sun's rays is less than it is at lower latitudes.

Of course, in countries (nearer the equator) with much stronger / hotter sunlight than we have in Northern Europe, you may very well be right in saying the use of plastic containers is a risk.


I use sealable plastic jars and they seem to work just. I live in central Oklahoma and the temperature soars to well over 100 degrees here. In fact it's been hitting 108 to 110 for the past three days and that's the forecast for the rest of the week.

Re: Fixing yellowed Transformers with a little help from H2O2

PostPosted: Mon Jul 30, 2012 9:34 am
by Seibertron
alldarker wrote:
Seibertron wrote:Not sure that using plastic containers is a good idea. Glass is the best option.

Wouldn't put zip loc bag out in sun with a chemical in it, especially on a mirror. Ziploc bag should get hot enough that it would melt and leak.

Glass containers (such as a cookie jar, baking glassware, etc) is most recommended.

I live in Northern Europe, where even on a sunny day, the temperature rarely passes 80 degrees :-(. There's literally no chance of zip-loc bags melting over here, even with a mirror under it. I use 3% peroxide, which shouldn't be nearly strong enough to disolve the plastic either. For my relatively high latitude, I'm thinking it's better to use a container that absorbs the least amount of the UV light as is possible, considering the strength of the sun's rays is less than it is at lower latitudes.

Of course, in countries (nearer the equator) with much stronger / hotter sunlight than we have in Northern Europe, you may very well be right in saying the use of plastic containers is a risk.


That would be glass then. Plastic containers absorb far more of the light than a glass container does. Think about what you're putting between what you're trying to restore and the sun's rays ... plastic! The very same thing that you're trying to fix. Just because it's clear, doesn't mean that the sun is getting through. You'll get results, you're just asking a lot more from the sun to get it to reverse the damage it caused your toy at one point.

El Duque, I bet this is the difference between our H2O2 runs of Go Shooter and Getaway. Glass container versus plastic container. I have a clear plastic container that I used to use for this process that was heavily yellowed, itself damaged by the process of being under the sun and because it absorbs so much of the sunlight. You'll get much faster results with glass.