Pressure-sensitive hectograph transfer element

Claim 1

A PRESSURE-SENSITIVE HECTOGRAPH TRASFER ELEMENT COMPRISING AS FLEXIBLE FOUNDATION CARRYING A VOLATILE-SOLVENT-APPLIED FRANGIBLE TRANSFER LAYER WHICH IS SUBSTANTIALLY COMPLETELY TRANSFERABLE TO A MASTER SHEET IN AREAS IMPRESSED WITH IMAGING PRESSURE, SAID TRANSFER LAYER COMPRISING FROM 3% TO 25% BY WEIGHT OF A SYNTHETIC THERMOPLASTIC FILM-FORMING BINDER MATERIAL, AN AMOUNT OF A MISCIBLE MIXTURE OF AT LEAST TWO OLEAGINOUS MODIFYING AGENTS IN EXCESS OF THE AMOUNT OF SAID BINDER MATERIAL, SAID MISICIBLE MIXTURE INCLUDING FROM 20% TO 80% BY WEIGHT OF AT LEAST ONE OLEAGINOUS MATERIAL WHICH IS SUBSTANTIALLY COMPATIBLE WITH SAID BINDER MATERIAL AND FROM 80% TO 20% BY WEIGHT OF AT LEAST ONE OLEAGINOUS MATERIAL WHICH IS SUBSTANTIALLY NON-COMPATIBLE WITH SAID BINDER MATERIAL, AND FROM 35% TO 65% BY WEIGHT OF A SPIRIT-SOLUBLE HECTOGRAPH DYESTUFF, SAID DYESUFF BEING SUBSTANTIALLY INSOLUBLE IN SAID OLEAGINOUS MATERIALS AND INSOLUBLE IN THE VOLATILE SOLVENT USED TO APPLY SAID TRANSFER LAYER.