>Haven't we heard at sometime on the list that "lithographers gum" isn't
>really gum arabic but is really a synthetic polymer? Possibly it is
>polyvinyl alcohol or a similar stuff? This cropped up somewhere in my
>research on gum.
>
Pierre Glafkides speak in his "Chimie et Physique Photographique"
about a bichromated polyvinyl alcohol process used to copy matrix in
photolithography and photogravure. The polyvinyl alcohol used in this
process its a high viscosity polyvinyl alcohol from Rhone-Poulenc Rhodoviol
25/100 M.
I head never tried to work with this process, maby it's amazing?
Martin Becka
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marbecka@club-internet.fr
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