De-yellowing

[Dave G4UGM]

> -----Original Message-----
> From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Jules
> Richardson
> Sent: 22 August 2015 13:25
> To: General at classiccmp.org; Discussion at classiccmp.org:On-Topic and Off-
> Topic Posts <cctalk at classiccmp.org>
> Subject: Re: De-yellowing
> 
> On 08/21/2015 05:28 PM, Evan Koblentz wrote:
> >
> >> So, how does one de-yellow something?  I have a VT-100 and some other
> >> gear that could use that process.
> >
> > Google for "Retr0brite".
> 
> I've never tried the stuff - but is it a permanent fix, or does the
yellowing
> gradually come back?

All the techniques discussed so far involve using a "bleach" of some kind
and possibly UV light. Some use other materials so you have a gell which
makes it easier to apply. 
>From what I have read  yellowing usually/often/always  re-occurs..

Dave