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Publication of NL6603012ApublicationCriticalpatent/NL6603012A/xx
B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
B41M5/00—Duplicating or marking methods; Sheet materials for use therein
B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
B41M5/0253—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet using a chemical colour-forming ink, e.g. chemical hectography