Re: Covering burn in (was RE: Picture tube re-builder?)

From: John Robertson <jrr_at_flippers.com>
Date: Tue Jul 03 2001 - 02:32:52 EDT

Theatre supply houses have a great variety of "Gels", these are thin
plastic films of virtually any colour and tint of grey imaginable. I would
expect one could find a tint.colour that would give the desired effect.
Somewhere I have a colour swatch stack of about thirty common tints and
colours, you can ask for them. Similar in idea to paint swatches of
multiple colour tints one can get at the larger paint shops.

The gels are very thin that you can easily lay them on a screen, and in
fact were used on early video game monitors when they were all black &
white to get "Colour" for the characters (Space Invaders, Star Castle and
others).

John :-#)#

At 06:27 PM 02/07/2001, you wrote:
>>I don't know if it was a standard thing, but on a few G08's that I've come
>>across, they've had a tinted plastic overlay which was form fitted to the
>>front of the picture tube. The tint masked phospher burn, and gave the
>>vectors a more aesthetically pleasing look.
>
>Hmmmm. Sounds like a job for home grown vacuum-forming equipment to me!
>Might not take much-- take a mould of the front face of a 19" tube, cast
>some plaster, groove some air-channels, and hook up a decent show-vac...
>Then find a plastic (thin plexi?) with the tint you want, heat it in an
>over so it's pliable, plop it on the jig and hit the vacuum. I don't
>think you'd need much suction since the shape is really simple (and the
>plastic's thin).
>
>Alternatively you might be able to use the glass face from an old tube and
>heat it up such that it could be pressed *into* a taunt sheet of the
>plastic (if it was thin enough) accomplishing the same thing.
>
>Or, maybe better yet-- hold the plastic in a jig, and heat up the plastic
>with an industrial shrink-wrap gun (or some tubes/diffuser hooked up to
>one). Then have a (cold and dead) monitor tube that you press into the
>plastic to form it. Added benefit is that the cold tube would chill the
>plastic and make it easier to remove that way to boot.
>
>Be fun to try...
>
>-Clay
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Received on Tue Jul 3 03:21:33 2001

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