Re: Clearing gum bichromate (and other carbon processes)
s carl king (sanking@hubcap.clemson.edu)
Fri, 12 Jan 1996 18:52:53 -0500 (EST)
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> We assemble CMY in register on the same plastic and when dry to STS
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What kind of *plastic* are you using. It must be quite permeable, otherwise
the two reliefs in contact would never dry out. This would definitely not
work with my polyester plastic and I am very interested to know the nature
of your plasic.
> >they were transferred one last time onto a final support. At that point the
> >STS was pulled gently off the final, and while it had a strong relief, I
> >dont remember seeing any dichromate at that stage on it. (How about you
> >Sandy?)
> You can see a pale yellow stain in this stage (backside)
The dichromate will not leech into any plastic I have ever worked with.
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> It is here you see the real yellow color -on the STS, before you throw it away.
I can only surmise that you must be using some kind of permeable plastic.
If it is clear and allows registration of the three reliefs on one support
I would be very interested in knowing what this plastic is because it would
surely offer some additional flexibility to the three-color process as i
work it..
Kind Regards,
Sandy King
Sanking@hubcap.clemson.edu
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