Radiation imagery chemistry: process – composition – or product th – Diazo reproduction – process – composition – or product – Composition or product which contains radiation sensitive...
Patent
1979-01-26
1980-09-23
Bowers, Charles L.
Radiation imagery chemistry: process, composition, or product th
Diazo reproduction, process, composition, or product
Composition or product which contains radiation sensitive...
430148, 430159, 430160, 430172, 430176, 430177, G03C 160, G03C 178
Patent
active
042243971
ABSTRACT:
A diazotype material useful for making duplicates of continuous tone originals, such as X-ray films, comprising a transparent film support having a coating of a layer thereon consisting essentially of at least two light-sensitive diazo compounds having different photolysis rates, couplers for the diazo compounds, an ultraviolet radiation absorbing material and homogeneously distributed in the layer at least about 7% by weight, based on the weight of lacquer, of an inert particulate material such as silica. The use of this material makes it possible to approximate a logarithmic photolysis, thereby providing sufficient linearity in the corresponding characteristic curve to achieve the desired duplicating results.
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Muller, P., "Precoating of Diazotype Paper", Tappi, 8/1965, pp. 55A-59 A.
Bowers Charles L.
Trans World Technology Laboratories Inc. (TWT Labs, Inc.)
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