yellowed murky plastic

[jpero at sympatico.ca]

> There is a second problem, though. The stripper may appear safe when you 
> use it, but may cause chemical changes in the plastic that make it go 
> very brittle, or something like that. I've seen a similar effect with 
> mineral oils on certain plastics. Seems OK for a bit, then it all starts 
> to fall apart.
> 
> -tony

Tony is correct, I have a plastic bus pass, it is color printed of 
face with name under it printed on it and two blank areas for monthly 
stickers to paste on.

Well, one day I tried more harsher chemicals (actone and oils) to get 
the gummy ickies off.   Actone attacked the prints, and eventually 
card started to warp and crack.  So I have to handle it gingerly till 
after vacation then I'll replace it.

Alochol, ammonia, normal all the way strong soaps is least harsh to 
most plastics.  I just washed a plastic window (smoker's stained) for 
a cd player in warm water and hand soap, came out like new, no new 
scratches too!   Much easier too.

Cheers, Wizard