Browse Prior Art Database

PROCESS FOR PREPARING RELIEF PRINTING MASTERS AND MOLDS

IP.com Disclosure Number: IPCOM000022763D
Original Publication Date: 1976-Jan-31
Included in the Prior Art Database: 2004-Mar-26
Document File: 2 page(s) / 238K

Publishing Venue

Xerox Disclosure Journal

Abstract

A process for preparing a mold for relief printing masters, said mold having an abhesive silicone surface, is provided comprising depositing a particulate material in image configuration on a suitable substrate. contacting said substrate with a second member comprising a substrate with an adhesive coating of a silicone guru curable to an abhesive elastomeric condition such that the adhesive gum is in contact with the image material, separating the members whereby the silicone layer splits in the nonimaged areas and is prevented from splitting by the transfer of the particulate image material to the second member in the image areas, and curing the silicone gum on the first member to an abhesive elastomeric condition to provide a mold for printing masters.

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XEROX DISCLOSURE JOURNAL

PROCESS FOR PREPARING RELIEF Proposed Classification
PRINTING MASTERS AND MOLDS U~S, Cl, 101
Alan B, Amidon Int, Cl, B41f

A process for preparing a mold for relief printing
masters, said mold having an abhesive silicone surface,
is provided comprising depositing a particulate material
in image configuration on a suitable substrate. contacting
said substrate with a second member comprising a substrate
with an adhesive coating of a silicone guru curable to an
abhesive elastomeric condition such that the adhesive gum
is in contact with the image material, separating the
members whereby the silicone layer splits in the nonimaged
areas and is prevented from splitting by the transfer of
the particulate image material to the second member in the
image areas, and curing the silicone gum on the first
member to an abhesive elastomeric condition to provide a
mold for printing masters.

The process for preparing the printing master comprises
the additional steps of filling the submerged portions
of said mold with a liquid but hardenable material suitable
for master imaging, contacting said liquid with a suitable
master substrate, hardening the liquid material and removing
the resultant printing master, Liquid but hardenable
materials which can be employed to form the image of the
master are rubbers such as styrene-butadiene rubber,
polyurethanes, silicone rubbers, natural rubbers, and
other conventional materials which have previously been
employed to form relief images. Pref...