Method of preparing a printing master by xerography

Abstract

Abstract A METHOD OF PRODUCING AN ETCH RESIST PATTERN BY XEROGRAPHY CONSISTING OF THE FOLLWING STEPS: FORMIMG ON A METAL SUBSTRATE A PHOTOCONDUCTIVE INSULATING COATING COMPRISING AN INTIMATE MIXTURE OF A PHOTOCONDUCTIVE POWDER AND AN ELECTRICALLY INSULATING RESIN BINDER CONTAINING CHEMICALLY ACTIVE FUNCTIONAL GROUPS WHICH CAN REACT WITH ISOCYANATE GROUPS; PROVIDING AN ELECTROSTATIC LATENT IMAGE ON SAID COATING; DEVELOPING SAID LATENT IMAGE WITH A TONER COMPRISING A MASKED POLYISOCYANATE COMPOUND; HEATING THE DEVELOPED PLATE TO AN ELEVATED TEMPERATURE SUFFICIENT TO REGENERATE THE ISOCYANATE THUS CAUSING A REACTION BETWEEN THE RESIN BINDER IN THE PHOTOCONDUCTIVE COATING AND THE POLYISOCYANATE WHEREBY THE RESIN BINDER IS COMPLETELY CURED AND BECOMES INSOLUBLE IN ORGANIC SOLVENTS, AND FINALLY REMOVING THE PHOTOCONDUCTIVE COATING AT THE AREAS WHERE NO TONER DEPOSITION OCCURRED AND THUS EXPOSING THE METAL SUBSTRATE.

Inventors

• 👤 S Honjo
• 👤 Y Tamai

Bibliographic Details