Printing inks and films printed therewith

Claim 1

FOR PRINTING FILMS FORMED OF A COMPOSITION CONSISTING ESSENTIALLY OF A BUTADIENE-ACRYLONITRILE COPOLYMER, A POLYMER SELECTED FROM THE GROUP WHICH CONSISTS OF POLYVINYL CHLORIDE, A COPOLYMER OF VINYL CHLORIDE AND VINYL ACETATE IN WHICH THE VINYL CHLORIDE IS THE MAJOR CONSTITUENT, A COPOLYMER OF VINYLIDENE CHLORIDE AND VINYL CHLORIDE IN WHICH THE VINYLIDENE CHLORIDE IS PRESENT IN AN AMOUNT NOT OVER 70%, AND AN ANTI-BLOCKING AGENT, AN INK COMPRISING COLORED PIGMENTS AND A VEHICLE CONSISTING ESSENTIALLY OF AN ALKYL PHOSPHATE OF THE CLASS WHICH CONSISTS OF TRIETHYL PHOSPHATE, TRI-(N)-PROPHYL PHOSPHATE AND TRI-(N)BUTYL PHOSPHATE, A VINYL CHLORIDEVINYL ACETATE COPOLYMER IN WHICH THE VINYL CHLORIDE IS THE MAJOR CONSTITUENT, SAID COPOLYMER BEING SOLUBLE IN SAID ALKYL PHOSPHATE AND PRESENT IN AN AMOUNT OF FROM 25% TO 33 1/3% BY WEIGHT OF SAID ALKYL PHOSPHATE, AND A RESINOUS, NON-ID MIGRATABLE PLASTICIZER FOR SAID COPOLYMER, SAID PLASTICIZER BEING OF LOW VOLATILITY, COMPATIBLE WITH SAID COPOLYMER, SOLUBLE IN SAID ALKYL PHOSPHATE AND PRESENT IN AN AMOUNT CONSTITUTING 15% TO 30% BY WEIGHT OF THE TOTAL VEHICLE SOLIDS, SAID INK BEING FREE OF VOLATILE SOLVENTS AND SETTING BY ABSORPTION OF SAID ALKYL PHOSPHATE IN SAID FILM.