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30646Re: I got the peroxide...May event

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  • DougCrawford
    May 13 6:19 PM
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      OK, I'll derive some info from there and see if I
      can get some chemistry analysis for color retention.
      Good tip about things that look good on ebay.


      --- In midatlanticretro@yahoogroups.com, "B. Degnan" <billdeg@...> wrote:
      >
      >
      > This subject is covered amply on vintage-computer.com/vcforum/ ... search
      > retrobrite (or however it's spelled). I am talking many many threads,
      > photos, experiments etc. I have a corresponded with the creator a few
      > times. Tez has a nice web page that demos the results of use.
      >
      > The bottom line .. Good but temporary results. May over a long period be
      > harmful. Best to use just before you show item at a vcf, or if you are
      > sleezy ...use before photographing to sell on ebay. Within two years 75%
      > of the yellowing returns. Caution ebay buyers..you might be buying a
      > retro-brited Apple II! Looks too good to be true?
      >
      > Bill
      >
      >
      > -------- Original Message --------
      > > From: "DougCrawford" <touchetek@...>
      > > Sent: Monday, May 13, 2013 5:05 PM
      > > To: midatlanticretro@yahoogroups.com
      > > Subject: [midatlanticretro] Re: I got the peroxide...May event
      > >
      > > I have a brother in law who is a chemist.
      > > I someone can send me a good link on the subject,
      > > I can see if he can offer a mechanism to stabilize the
      > > plastic to retain the restored color.
      > > Maybe make it UV resistant?
      > > I'm no chemist.
      > >
      > > --- In midatlanticretro@yahoogroups.com, "nicodemus_nj" <dwobser@>
      > wrote:
      > > >
      > > >
      > > > That's right, I read that it is the bromine used as a fire-retardant,
      > that reacts (oxidizes?) under UV light exposure to cause yellowing.
      > > >
      > > > To reduce the discoloration coming back, keep the item out of excessive
      > UV light.
      > > >
      > > >
      > > > --- In midatlanticretro@yahoogroups.com, "s100doctor" <hjohnson@>
      > wrote:
      > > > >
      > > > > My thanks to Bill Degnan and Mike Willeagle for posting that
      > "retrobrite" de-yellowing only lasts months or a few years and items revert
      > over that time. This is good to know.
      > > > >
      > > > > For those interested in details, A smart chemist could likely tell us
      > why that's so. It's likely related to brominated hydrocarbons (plastics),
      > is my guess.
      > > > >
      > > > > Herb Johnson
      > > > >
      > > >
      > >
      > >
      > >
      > >
      > > ------------------------------------
      > >
      > > Yahoo! Groups Links
      > >
      > >
      > >
      >
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