Author Topic: Possible telephone case/shell yellowing reversal: READ!  (Read 12018 times)

Offline Dan

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Re: Possible telephone case/shell yellowing reversal: READ!
« Reply #30 on: April 14, 2009, 09:57:54 AM »
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

Offline Dan

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Re: Possible telephone case/shell yellowing reversal: READ!
« Reply #31 on: April 16, 2009, 09:52:11 AM »
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
« Last Edit: April 16, 2009, 09:56:16 AM by Dan »
"Imagine how weird telephones would look if our ears weren't so close to our mouths." - Steven Wright

Offline contraste

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Re: Possible telephone case/shell yellowing reversal: READ!
« Reply #32 on: April 16, 2009, 10:16:58 AM »
Ouch!
Looks like peroxide solutions on coloured plastic is not such a great idea perhaps.

Offline Dan

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Re: Possible telephone case/shell yellowing reversal: READ!
« Reply #33 on: April 16, 2009, 10:28:52 AM »
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

Offline Tonyrotary

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Re: Possible telephone case/shell yellowing reversal: READ!
« Reply #34 on: April 16, 2009, 10:31:33 AM »
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.

Offline Dan

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Re: Possible telephone case/shell yellowing reversal: READ!
« Reply #35 on: April 16, 2009, 07:53:09 PM »
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.
« Last Edit: April 16, 2009, 09:04:56 PM by Dan »
"Imagine how weird telephones would look if our ears weren't so close to our mouths." - Steven Wright

Offline Dennis Markham

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Re: Possible telephone case/shell yellowing reversal: READ!
« Reply #36 on: May 13, 2009, 12:23:10 AM »
Dan, this "after" link isn't working.

http://tinyurl.com/d4cssx

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

Dennis

Offline Dan

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Re: Possible telephone case/shell yellowing reversal: READ!
« Reply #37 on: May 13, 2009, 12:45:44 AM »
 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

Offline Tribune

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Re: Possible telephone case/shell yellowing reversal: READ!
« Reply #38 on: August 29, 2010, 07:54:56 PM »
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!"

Offline bingster

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Re: Possible telephone case/shell yellowing reversal: READ!
« Reply #39 on: August 29, 2010, 09:29:50 PM »
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 =