----- Original Message -----
From: "John Gardner" <[email protected]>
To: <[email protected]>
Sent: Monday, June 12, 2017 9:30 PM
Subject: Re: [M100] Removing scratches from plastic protector for LCD?
> ...Retrobright...
>
> I've heard it both ways - What's the right way, Mike?
>
> ...
Actually, John, I don't have any personal experience or opinion about
retrobrite although I have followed many lengthy and spirited discussions on
various forums and mail lists; I just wanted to point out that as you say,
while many people share Brian's opinion that it doesn't last there are also
quite few people who swear by it.
I was being facetious when I suggested that Brian might be doing it wrong, but
perhaps the slight differences in various peoples' recipes do indeed make a
really substantial difference in the outcome.
As to making the plastic brittle, quite a few plastic cases are notorious for
becoming extremely brittle with age (without retrobrite), so it's hard to say
whether it would have happened anyway or whether some types of plastic are
susceptible to this effect while others are not.
It does seem to be one of the most controversial and polarized topics across
most of the vintage computer forums, almost in the league of ESP, NDEs and UFOs
;-).
Anyway, as I said, I don't think it's as clear cut as a sweeping "It doesn't
last and makes the plastic brittle"; Here's a current thread from a Commodore
list (retrobriting, painting, and even new custom molded cases are pretty
popular among the C64 crowd):
-------------------------------------------------------
----- Original Message -----
From: ---
To: CBM hackers.
Sent: Monday, June 12, 2017 7:58 AM
Subject: Re: Retrobright
My experience with Retrobrighting was with oxy laundry bleach and a fluorescent
black-light. I took a few photos HERE.
The temperature of the water has to exceed 55c for it to release peroxide, and
it took 3 cycles, with about 400G of oxy bleach in each batch.
The discolouration of the plastic was more severe than the photo indicates (but
not as bad as I've seen it), and the result whiter than it looks in the final
assembled photo, but the difference was striking. Unlike some reports the
bleaching has held after 4 years and the machine still looks great.
The rather ghoulish unearthly blue glow is of course due to the fluorescent dye
in modern bleaches to make things "Whiter than white".
I prefer a lighter hand with things like retrobrighting, and don't aim for
gleaming pristine newness at all costs. label damage, blotchiness and surface
damage can make matters worse: something I have, unfortunately experienced.
I also have a natural wariness of caustic chemicals.
Julian
Hi,
My experience with the plastic wrap is that it causes patch effects. I
would not recommend that. It is better to keep your eyes on it and reapply
retrobright when it dries.
When it is on the sun you will see the color change and know when it is
ready.
Istvan
From: xxx
Sent: Saturday, June 10, 2017 9:18 PM
To: [email protected]
Subject: Retrobright
Hi
I have the different recipes for Retrobright
Hydrogen Peroxide
OXY Clean
Corn Starch for thickener
Then paint on with paintbrush wrap with plastic wrap.
Let sit in sun and rotate case etc, but how long and when would I need
to rotate plastic?
Terry Raymond
