[Coco] retrobright

[Zippster]

Except it doesn’t yellow inside the cases, or at least not nearly as rapidly on the ones
I have anyway.  The yellowing on the outside of the cases is pretty uniform though, not showing
marked differences where something blocked light exposure, like I’ve definitely seen on
some computers (older macintoshes especially).

That makes it seem like it may be a reaction between the case material and the atmosphere
(oxygen perhaps) over time.  If so, a good sealant may do the trick if it acts as a gas barrier.

Maybe?

- Ed

> On Jan 9, 2015, at 1:18 PM, Frank Swygert <farna at amc-mag.com> wrote:
> 
> I'm pretty sure it's the chemical makeup of the plastic that causes the yellowing -- yellows as it ages. Different batches yellow at different rates. The best long term protective option might be a good paint. That will protect the plastic from UV rays as well as exposure to other chemicals, should make it last longer before it becomes brittle. Not original, but what's the point of having it original if you can't handle it for fear or breaking?
> 
> -- 
> Frank Swygert
> Editor - American Motors Cars Magazine
> www.amc-mag.com
> 
> 
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