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PHOTOINDUCED INK RECEPTIVE IMAGES IN SILICONE SYSTEMS FOR WATERLESS LITHOGRAPHY APPLICATION

IP.com Disclosure Number: IPCOM000022816D
Original Publication Date: 1976-Feb-29
Included in the Prior Art Database: 2004-Mar-26
Document File: 2 page(s) / 212K

Publishing Venue

Xerox Disclosure Journal

Abstract

It has recently been discovered that if the non-imaged areas of the printing master are formed of an abhesive ink releasing silicone elastomer, ink will not adhere to said elastomer so that a fountain solution or dampening solution is no longer required. One difficulty encountered with these new silicone masters, however, is that it is difficult to image the master unless the silicone is removed in the imaged areas so as to permit printing from an underlying substrate, Thus, because the silicone is abhesive, particulate imaging materials such as toner cannot be easily adhered to the silicone.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 97% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

PHOTOINDUCED INK RECEP- Proposed Classification
TIVE IMAGES IN SILICONE U.S. Cl. 101
SYSTEMS FOR WATERLESS mt. ci, B4if
LITHOGRAPHY APPLICATION
Richard L. Schank

It has recently been discovered that if the non-imaged

areas of the printing master are formed of an abhesive
ink releasing silicone elastomer, ink will not adhere
to said elastomer so that a fountain solution or dampening
solution is no longer required. One difficulty encountered
with these new silicone masters, however, is that it is
difficult to image the master unless the silicone is
removed in the imaged areas so as to permit printing from
an underlying substrate, Thus, because the silicone is
abhesive, particulate imaging materials such as toner
cannot be easily adhered to the silicone.

This problem is obviated in accordance with this invention
by coating a suitable master substrate with a layer compri-
sing an abhesive silicone polymer or a silicone polymer
which can be cured to an abhesive condition, a silicone

fluid having reactive pendant hydrogen atoms, and a
sensitizer for the silicone fluid. The coating is then
subjected to activating electromagnetic radiation suffi-
cient to activate the sensitizer and render the coating
ink-accepting in the image areas, and the background areas
cured to an elastomeric condition.

Volume 1 Number 2 February 1976 21

[This page contains 1 picture or other non-text object]

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