Multiple copy photographic system
Abstract
Abstract THIS DISCLOSURE RELATES TO NEW OFFSET PRINTING MASTERS WHICH CONTAIN A SUPPLY OF PRINTING FLUID THUS PERMITTING THEIR USE IN MULTIPLE COPYING. THE NEW MASTERS OBVIATE THE NEED OF FREQUENT REPLENISHMENT OF THE PRINTING FLUID. THE NEW MASTERS OF THIS INVENTION COMPRISE CRAZED THERMOPLASTIC LAYERS IN WHICH THE EXTENT OF CRAZING PERMITS RETENTION OF A SUPPLY OF PRINTING LIQUID IN THE THERMOPLASTIC LAYER. VARIOUS SUCH MASTERS ARE DESCRIBED IN WHICH THE PRINTING LIQUID IS ADDED FROM AN EXTERNAL SOURCE OR IS PRESENT IN THE OFFSET MASTER AND AVAILABLE FOR PRINTING AFTER CRAZING OF THE THERMOPLASTIC LAYER. ALSO DESCRIBED ARE MASTERS WHICH ARE ESPECIALLY SUITABLE FOR USE WITH OLEPHILIC OR HYDROPHILIC PRINTING LIQUIDS BY VIRTUE OF THE CONTENT THEREIN OF A LAYER OF OLEPHILIC OR HYDROPHILIC MATERIAL MADE AVAILABLE TO THE CRAZED AREAS OF THE THERMOPLASTIC LAYER BY THE EXTENT OF CRAZING. PROCESSES OF MULTIPLE COPYING USING THE NEW OFFSET PRINTING MASTERS ARE ALSO DESCRIBED.
Inventors
- 👤 Richard F Bartlett
- 👤 Laura K Case
Bibliographic Details
Claims Analysis
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