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How to remove yellowing from an old Atari case

905 replies to this topic

#901 Stephen OFFLINE  



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  • Location:No longer in Crakron, Ohio

Posted Wed Oct 18, 2017 6:28 PM

Ok, I know this is 8 bit retrobriting, but I also own a bunch of ST stuff.. and thats what I am looking to retrobrite right now.


It is Grey, so.. will it bring it back to grey? or white?



Be careful with them!  The 65/130XE as well as the ST cases are very susceptible to "bloom".

#902 Bikerbob ONLINE  



  • 596 posts
  • Location:Mississauga ON Canada

Posted Thu Oct 19, 2017 6:04 AM

So is there a better, or preferred method for those cases? I can use mine, but it would be nice since I have it all apart for hardware upgrades to clean up the cases and the keys.



#903 martinez OFFLINE  


    Combat Commando

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Posted Thu Oct 19, 2017 6:35 PM

Not sure it will help, but check out this blog:

This guy retrobrites without exposing plastics to sunlight, uses warmth instead. Just covers plastics with 12% peroxide cream, wraps carefully in black foil, then keeps it in dark warm place for one week. This treatment seems to be quite "safe", I mean, looks like prolonged procedure and avoiding UV-light prevent plastics from partial discoloring etc. imperfections.

I think the best way is to retrobrite something cheap and easy to replace first. Such as an old XC12 recorder, or STM-1 mouse. When you fine with the outcome, use the same treatment to your precious ST case.

Edited by martinez, Thu Oct 19, 2017 6:38 PM.

#904 Osgeld OFFLINE  


    River Patroller

  • 4,320 posts
  • Location:Nashville, TN

Posted Thu Oct 19, 2017 6:46 PM

just like bbq slow and low, with even treatment of sauce = mmm mmm good


besides blotching which is mostly due to uneven paste application, my biggest beef if BLEACH WHITE, like that darn 8 bit idiot, everything he does turns titanium white and blotchy, ya that keyboard was platinum silvery grey, not RGB 255,255,255, and that osbourne was medium grey, not winter alps snow 

Edited by Osgeld, Thu Oct 19, 2017 6:49 PM.

#905 flashjazzcat ONLINE  



  • 12,759 posts
  • Location:United Kingdom

Posted Fri Oct 20, 2017 3:05 AM

Oh yeah... He totally destroyed the Osborne.

#906 Bikerbob ONLINE  



  • 596 posts
  • Location:Mississauga ON Canada

Posted Fri Oct 20, 2017 9:22 AM

Hmmm.. nothing so far is making me want to try this.. LOL.. I like the clear solution in the water and the sunlight.. maybe its a matter of less time?



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