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Offline stefcep2Topic starter

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Retrobrite
« on: March 20, 2010, 11:41:30 PM »
As many of you would know Retrobrite is a mixture that can be used to whiten plastics that have yellowed, like Amiga cases and keys.  The folks at EAB have an in-depth sticky on it.

Just like to say it works.  And how!!  Bought some "Creme developer" which contains 12% hydrogen peroxide from cosmetics shop (Priceline ,can also get from any hair dresser), added a pinch of washing powder with Oxy (dissolved first in a bit of water) and then applied the pasty mix to my A1200 case, A4000 front face, A4000 keyboard, with a small paint brush, left it in the sun for 8  hours, and they all ended up looking white.  As in "looks new" white.  Amazing!!!

The keys I removed individually and put then in a glass jar, added some tap water to the mix and left out in sun.  Took longer to whiten-probably because the mixture was diluted.  Also came out "as new white".

Really simple, cheap ( $5 for 200 ml of peroxide 12%, $10 for 1 litre, and $5 for 1 litre of oxy washing powder, far more than you'll need), and EFFECTIVE.  Kudos to the folks at EAB.

Also did it to a SNES I had, worked a treat.
 

Offline tone007

Re: Retrobrite
« Reply #1 on: March 20, 2010, 11:43:37 PM »
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Offline Cammy

Re: Retrobrite
« Reply #2 on: March 21, 2010, 01:02:44 AM »
Wow, that 12% Creme Developer from Priceline works? I bought some of that because it was the strongest peroxide available, but I didn't think it'd be strong enough to use for RetroBright. I still used it in a tub when I cleaned my Amigas, but next time I'll try the same method with the Oxy and leaving it outside for a day, thanks!
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Offline dreamcast270mhz

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Re: Retrobrite
« Reply #3 on: March 21, 2010, 01:24:58 AM »
If you need stronger peroxide get a 5% and boil it down, peroxide boils higher than water so teh water will boil out. Be careful though.
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Offline whiteb

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Re: Retrobrite
« Reply #4 on: March 21, 2010, 01:27:09 AM »
Quote from: stefcep2;548853


The keys I removed individually and put then in a glass jar, added some tap water to the mix and left out in sun.  Took longer to whiten-probably because the mixture was diluted.  Also came out "as new white".

Really simple, cheap ( $5 for 200 ml of peroxide 12%, $10 for 1 litre, and $5 for 1 litre of oxy washing powder, far more than you'll need), and EFFECTIVE.  Kudos to the folks at EAB.

Also did it to a SNES I had, worked a treat.


With the keys, do you have a problem with the Letter maskings coming off ?, or being bleached ?
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Offline whiteb

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Re: Retrobrite
« Reply #5 on: March 21, 2010, 01:42:29 AM »
Quote from: dreamcast270mhz;548875
If you need stronger peroxide get a 5% and boil it down, peroxide boils higher than water so teh water will boil out. Be careful though.


To be perfectly honest, I would not feel comfortable with trying to self concentrate peroxide on the cooker.., That stuff can be.... "Explosive", which is probably an under estimate of the result.

It can corrode skin (Think acid) in higher purities.  The Nazi's experimented with strong Hydrogen peroxide as a way of killing (Jews).
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Offline Arkhan

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Re: Retrobrite
« Reply #6 on: March 21, 2010, 01:43:17 AM »
Quote from: Cammy;548870
Wow, that 12% Creme Developer from Priceline works? I bought some of that because it was the strongest peroxide available, but I didn't think it'd be strong enough to use for RetroBright. I still used it in a tub when I cleaned my Amigas, but next time I'll try the same method with the Oxy and leaving it outside for a day, thanks!


yeah man, take it from me and Tone007.  throwin the crap out in direct sunlight is the way to go !its like the 6 million dollar man.

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Offline stefcep2Topic starter

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Re: Retrobrite
« Reply #7 on: March 21, 2010, 02:21:55 AM »
Quote from: whiteb;548876
With the keys, do you have a problem with the Letter maskings coming off ?, or being bleached ?


None whatsover!!.  Look BRAND NEW.  I was surpised how the dark functions keys came out, I didn't think they were as yellowed, but they were, I can really see the yellow in the couple I kept for comparison.
« Last Edit: March 21, 2010, 02:28:50 AM by stefcep2 »
 

Offline stefcep2Topic starter

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Re: Retrobrite
« Reply #8 on: March 21, 2010, 02:28:08 AM »
Quote from: Cammy;548870
Wow, that 12% Creme Developer from Priceline works? I bought some of that because it was the strongest peroxide available, but I didn't think it'd be strong enough to use for RetroBright. I still used it in a tub when I cleaned my Amigas, but next time I'll try the same method with the Oxy and leaving it outside for a day, thanks!


And you don't need ti use xanthum gum or glycerol. Just brush on the mix of Creme developer with Sards Oxy or White King Oxy washing powder dissolved in a bit of water(Safeway, $5-$6 for 1 L )

It does dry out however, and every couple of hours I just went over the case with a moist brush.

I think it works quickly here in Aus because of our UV levels.  We don't have the highest rates of skin cancer in the world for nothing!
 

Offline stefcep2Topic starter

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Re: Retrobrite
« Reply #9 on: March 21, 2010, 09:48:05 PM »
Here's some photos.

I didn't take a photo of the case before I retro-brighted it, but it ws yellow like the keys.
 

Offline Cammy

Re: Retrobrite
« Reply #10 on: March 21, 2010, 10:56:32 PM »
Ooh la la! That looks awesome :)
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Offline dreamcast270mhz

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Re: Retrobrite
« Reply #11 on: March 21, 2010, 11:09:54 PM »
Very nice, I'll have to make some soon for my old A2k keyboard I use for my 3000D
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Offline stefcep2Topic starter

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Re: Retrobrite
« Reply #12 on: March 21, 2010, 11:18:53 PM »
Sunlight and the oxy seem to be the vital ingredients.
 

Offline Karlos

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Re: Retrobrite
« Reply #13 on: March 22, 2010, 12:02:46 AM »
Quote from: stefcep2;549109
Sunlight and the oxy seem to be the vital ingredients.


It's actually quite interesting. Assuming they got the chemistry right, it's one of the few applications in which hydrogen peroxide is used as a reducing agent rather than the far more common application as a strong oxidising agent (for example, it can be dissociated into OH radicals which are pretty much second only to fluorine in terms of oxidising power).

By the sound of it, the reaction with the bromine-oxygen species present may be similar to the one you get when reacting it with hypochlorite (one method of producing oxygen for small scale lab purposes) in which it is also a reducing agent.
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Offline whiteb

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Re: Retrobrite
« Reply #14 on: March 22, 2010, 01:03:37 AM »
Quote from: stefcep2;549109
Sunlight and the oxy seem to be the vital ingredients.


Yes, from the EAB thread....

UV light (component of sunlight) breaks down the bromine bonds, and Oxy to make the environment *EXTREMELY* hungry for oxygen.  Thus accelerating the process.  or thats how i understood it.
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