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Publication of FR747262ApublicationCriticalpatent/FR747262A/fr
B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
B41M5/00—Duplicating or marking methods; Sheet materials for use therein
B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
FR747262D1932-02-111932-02-11Procédé de reproduction et d'obtention de copies d'impressions originales
ExpiredFR747262A
(fr)