Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Light scattering or refractive index image formation
Patent
1980-09-23
1982-03-23
Welsh, John D.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Light scattering or refractive index image formation
430291, 430 6, 430950, G03C 714
Patent
active
043213200
ABSTRACT:
Process for modifying a tacky surface of a multilayer negative-working surprint proof having a photosensitive tacky layer as the outer layer which comprises exposing the tacky layer through a screen tint, e.g., having a tint value of 25 to 75 percent, and applying an admixture of particulate material and carrier particles and removing excess particulate material and the carrier particles from the tacky surface. The ratio of average particle diameter of the carrier particles to average particle diameter of the particulate material is greater than 2 and the weight ratio of particulate material to carrier particles is less than 1. A durable matte finish is obtained that is nonblocking, is capable of being written on, and is noncracking over extended storage periods.
REFERENCES:
patent: 45245 (1864-11-01), Cohen et al.
patent: 4229518 (1980-10-01), Gray et al.
patent: 4247619 (1981-01-01), Cohen et al.
E. I. Du Pont de Nemours and Company
Welsh John D.
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