Paper support with sealing layer and layer containing...

Details Paper support with sealing layer and layer containing... Paper support with sealing layer and layer containing...

G - Physics

03

C

96/200

G03C 1/60 (2006.01) G03C 1/79 (2006.01)

Patent

CA 1066107

ABSTRACT OF THE DISCLOSURE Diazotype material comprising a paper support, the same side of which is coated successively with a sealing layer containing as a film- forming binder polyvinyl acetate, or a copolymer of styrene with butadiene, and a light-sensitive layer having a dry weight of at most 8 g/m2 and comprising a diazonium compound, polyvinyl alcohol with a degree of hydrolysis over 75% and starch particles, whereby the weight ratio starch particles to polyvinyl alcohol is from 5 - 20:1. The diazotype material can be developed quickly and completely giving strong copies which feel immediately dry and show no appreciable curl.

227895

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