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Possible telephone case/shell yellowing reversal: READ!

Started by BDM, March 05, 2009, 01:48:27 PM

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Dan

I haven't had a real yellowed (significantly) colored one yet, however, I am going to try it today on a Moss green 500. I'll post the pictures when it is done. I would think it would work also.
"Imagine how weird telephones would look if our ears weren't so close to our mouths." - Steven Wright

Dan

I used my 1974 housing replaced Moss Green WE 500 as a guinea pig. The housing was 40% peroxide, the handset 20%


Before with yellowing

http://tinyurl.com/c99a3a

After

http://tinyurl.com/d4cssx

I learned a hard lesson here! The 20% worked great, while the 40 was too strong. So it will work with colored sets, but BE CONSERVATIVE, and start with a lower concentration. The handset looks great, the housing looks frosted
"Imagine how weird telephones would look if our ears weren't so close to our mouths." - Steven Wright

contraste

Ouch!
Looks like peroxide solutions on coloured plastic is not such a great idea perhaps.

Dan

I would say with 20% or less it would be ok, try 10% if you want to be supersafe.
"Imagine how weird telephones would look if our ears weren't so close to our mouths." - Steven Wright

Tonyrotary

Hmmm, so what I have gathered you can use up to 40% on white phones but stick to 20% percent on colored phones. I wonder if you could polish that out a bit? Or maybe wet sand the case using 1000 grit. Then smooth it out using polish? Might take a couple of hours but at this point might be worth it.

Dan

It will come out, but it's a 1974 garden variety one. I'll put it in my pile of things to do.... Thanks for the tips Tony.
"Imagine how weird telephones would look if our ears weren't so close to our mouths." - Steven Wright

Dennis Markham

Dan, this "after" link isn't working.

http://tinyurl.com/d4cssx

Is there any chance you could repost the after photo here? 

Dennis

Dan

 It looks like someone in the family has deleted some of my pictures. I'll get you a new picture up tomorrow.
"Imagine how weird telephones would look if our ears weren't so close to our mouths." - Steven Wright

Tribune

I've been contemplating attempting this process my self using a liquid bath approach rather than an applied gel. Sam Hallas on his website documenting his collection of UK phones documents his experiences in great detail using both the gel application and different liquid bath techniques:- see the Retr0bright Experiment. He describes the chemistry in good detail and shows some pretty good before and after shots.

In particular, I'm keen to try this on my beige (originally gray) Lebanese 500 look-a-like, but am concerned about the printed metal insert in the dial plate. Also wondering if browned clear plastic as used on finger wheels would clear up too.
Mark Furze - TCI, ATCA

To miss-quote "Bones" McCoy . . .
                     "darn it Jim - I'm a doctor, not a telephone engineer!"

bingster

I can't comment on the case bleaching techniques as I've never tried them, but the yellowing of the dial card windows can be completely cleaned off by any plastic polish.  I clean mine with Brasso, and they come out like new.
= DARRIN =



markosjal

Does anyone have the  info from the link in Original post?
Link is now dead!

Better to post the info here at least copy for that reason.
Phat Phantom's phreaking phone phettish

TelePlay


FABphones

This is the link for an extremely discoloured yellow/tan (ABS) gpo phone that I recently restored back to Ivory (with before and after pics):

http://www.classicrotaryphones.com/forum/index.php?PHPSESSID=bb4773256bde51c061dcc971ab7663fb&topic=20579.msg210386#msg210386
A collector of  'Monochrome Phones with Sepia Tones'   ...and a Duck!
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Vintage Phones - 10% man made, 90% Tribble
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