Closing and/or sealing orifices, cavities or spaces in printing

Details Closing and/or sealing orifices, cavities or spaces in printing Closing and/or sealing orifices, cavities or spaces in printing

1988-10-21

1990-05-22

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

430281, 430285, 430307, 430283, 430328, 430908, 430906, 430300, 1014151, G03F 702, G03C 168

Patent

active

049277405

ABSTRACT:
Orifices, cavities or spaces which are formed when printing plates are mounted on a plate cylinder are closed and/or sealed by means of a pasty, photocurable sealing or closing compound consisting of one or more photopolymerizable, ethylenically unsaturated low molecular weight compounds (a), one or more polymeric binder (b) which are compatible with the said compounds of component (a), one or more photopolymerization initiators (c) and one or more finely divided oxidic fillers (d) which, when mixed with components (a) to (c), give mixtures which are transparent to long-wavelength UV light. After it has been applied, this sealing or closing compound is cured by exposure and can then be mechanically processed. The process is particularly suitable for closing and/or sealing orifices, cavities or spaces in gravure printing plates mounted on plate cylinders.

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Deutscher Drucker, No. 41, (1975), pp. 17-22, No translation.
Fikentscher, Cellulose, Chemie, 13, (1932), pp. 58-64, No translation.
Modern Plastic Encyclopedia, 1972-73, p. 393.

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