Water developable diazonium and mineral acid containing recording material for producing water-free offset printing plates
First Claim
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1. A water-developable radiation-sensitive recording material comprising in the following order:
- a base;
a radiation-sensitive layer comprising a diazonium salt polycondensation product and 3 to 50% by weight, relative to the total weight of the radiation-sensitive layer, of a mineral acid; and
a silicone layer in contact with said radiation sensitive layer.
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Abstract
A radiation-sensitive recording material comprising:
a base;
a radiation-sensitive layer comprising a diazonium salt polycondensation product and 3 to 50% by weight, relative to the total weight of the radiation-sensitive layer, of a mineral acid; and
a silicone layer.
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Citations
26 Claims
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1. A water-developable radiation-sensitive recording material comprising in the following order:
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a base; a radiation-sensitive layer comprising a diazonium salt polycondensation product and 3 to 50% by weight, relative to the total weight of the radiation-sensitive layer, of a mineral acid; and a silicone layer in contact with said radiation sensitive layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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23. A recording material as claimed in claim 22, wherein the anion X of the condensation product is selected from the group consisting of chloride, sulfate, hydrogensulfate, hydrogen- or dihydrogenphosphate, hexafluorophosphate, tetrafluoroborate and an unsubstituted or substituted alkanesulfonate or arenesulfonate.
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24. A radiation-sensitive recording material as claimed in claim 1, wherein after being exposed to imagewise radiation, said recording material is capable of being developed using pure water.
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25. A radiation-sensitive recording material as claimed in claim 1, wherein after being exposed to imagewise radiation, said recording material is capable of being developed using pure water within one minute.
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26. A method for producing a water-free offset printing plate comprising:
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imagewise irradiating a recording material as claimed in claim 1 to form an irradiated recording material; and developing said irradiated recording material with water.
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Specification