Restoring sunlight-yellowed plastic

[D.M. Procida]

I have a white telephone, which isn't that old, but has become distinctly yellowed by sunlight (unexposed areas remain white).

What is your preferred method of restoring the colour?

Daniele

[Bob Eager]

I haven't looked for a while, but Google used to show a variety of home made preparations that had some effect. Unfortunately, it depends on the plastic, so it's a bit 'suck it and see'.

[The Natural Philosopher]

try t-cut

[Andy Burns]

I've never done it, but retr0brite is a pseudo-product name for a home brew mixture of hydrogen peroxide and "oxi" type washing brightener powder with UV exposure (sunlight will often work but probably not in January!)

See youtube (The 8-bit Guy and others) for examples of how to do it, and the strength of peroxide to use.

[Brian Gaff]

There isn't one. You have a phone made of el cheapo plastic. Brian

[Andy Burns]

Actually the results can be quite impressive on un-yellowing 1980's computers, I don't know how long the whitening lasts, or if doing it repeatedly weakens the plastic.

[D.M. Procida]

There are several very effective ways of doing it.

I'm hoping to find out if any have worked for readers of this newsgroup and can be particularly recommended.

Daniele