25 Aug
2015
25 Aug
'15
12:23 a.m.
Sometimes the yellow coming off is just the degraded plastic. Even a mild
cleaning just removes the surface layer of degraded plastic.
-----Original Message-----
From: Chris Elmquist
Sent: Monday, August 24, 2015 7:56 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: De-yellowing
On Monday (08/24/2015 at 04:43PM -0700), Ali wrote:
I don't have any pictures-- no before/after sort of thing as I am
usually done with these projects before I think about taking pictures.
I'm not big on that.
I did this a little over a year ago and they look the same today as
they did when I finished putting them back together. Not that this is
any evidence of how they will look in 30 more years but there's a good
chance I will be done with them by then any way...
Chris
--
Chris Elmquist
---
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I recently
restored several VT100 that were extremely yellowed as well
as filthy dirty.
I put the plastics in my bathtub and sprayed them heavily with "Krud
Kutter", intending only to remove the dirt. To my surprise, much of
the yellowing came off too. It didn't return them to their pristine
original color but significantly reduced the yellowing as a tea colored
runoff pooled in the bottom of the tub.
Chris,
Do you have pictures? I wonder if one of the main ingredients maybe H2O2.
Also how long ago did you do this? There may not have been enough time for
a
return to the yellow color.