Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making printing plates
Patent
1979-07-19
1981-09-22
Schilling, Richard L.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making printing plates
430271, 430327, 430328, G03C 500
Patent
active
042911168
ABSTRACT:
A high resolution image is accurately but readily reproduced by placement of a film master, such as a positive photographic film, in direct contact with a wet, high solids content, radiation curable material distributed on a screen. The radiation curable material is responsive to a limited wavelength band in the ultraviolet region. It includes a sensitizer, may include a reactive diluent, is preferably free of acrylates and of low toxicity, has a viscosity sufficient to maintain a fixed spatial relationship between the master and substrate, and further advantageously incorporates a minor amount of radiation attenuating dimensional stabilizer in the form of a distributed particulate. The photopolymer material is first spread across one side of the screen against the film master to form an underlayer which is then irradiated through the film master with a suitable light source. An overlayer of more than desired thickness is spread on the second side and irradiated for a time interval proportioned to the thickness of the screen, to provide a uniform and preselected depth of overlayer that is chemically bonded to the underlayer. The master is then stripped off without damage, the uncured material removed, and the reproduced image is post cured by exposure from the side opposite the prior exposures. The result is a high resolution, extremely durable image in which the filaments are fully encapsulated by material in the cured stencil regions. Both permanent and reclaimable stencils may be made, and a given photopolymer system may be utilized with a wide range of mesh sizes.
REFERENCES:
patent: 1064166 (1913-06-01), Pindikowsky
patent: 2791504 (1957-05-01), Plambeck
patent: 3507652 (1970-04-01), Wrench
patent: 3507654 (1970-04-01), Wrench
patent: 3510303 (1970-05-01), Preddy et al.
patent: 3615450 (1971-10-01), Werber et al.
patent: 3730715 (1973-05-01), Ketley et al.
patent: 3826650 (1974-07-01), Schlesinger
patent: 3837887 (1974-09-01), Akamatsu et al.
patent: 4038078 (1977-07-01), Sakurai et al.
patent: 4048035 (1977-09-01), Ide et al.
patent: 4090936 (1978-05-01), Barton
patent: 4209582 (1980-06-01), Merrill et al.
patent: 4216019 (1980-08-01), Reed et al.
patent: 4216287 (1980-08-01), Sano et al.
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