Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Forming nonplanar surface
Patent
1990-12-11
1993-07-13
McCamish, Marion E.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Forming nonplanar surface
430328, 430330, G03F 730
Patent
active
052272818
ABSTRACT:
A process for producing negative copies is disclosed in which a light-sensitive or radiation-sensitive recording material comprising a layer support and a normally positive-working light-sensitive or radiation-sensitive layer applied thereto is irradiated imagewise, thermally treated, irradiated overall and then developed with an alkaline developer. Thermal treatment is carried out with water or with an aqueous solution, at temperatures in the range from about 50.degree. to 100.degree. C., preferably from 60.degree. to 90.degree. C., within a period of time varying between about 1 second and 5 minutes, preferably between 5 seconds and 1 minute, overall irradiation is performed on the optionally still hot recording material and development is thereafter carried out within a period of time varying between about 10 seconds and 2 minutes, preferably between 15 seconds and 1 minute. The process can be carried out according to the customary procedure known in the practice of positive processing, and results in perfect printing stencils.
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Elsaesser Andreas
Frass Hans W.
Gaschler Otfried
Mohr Dieter
Hoechst Aktiengesellschaft
McCamish Marion E.
Rodee Christopher D.
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