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Priority claimed from CH906077Aexternal-prioritypatent/CH633641A5/en
Application filed by Ciba Geigy AgfiledCriticalCiba Geigy Ag
Publication of IT7850371A0publicationCriticalpatent/IT7850371A0/en
Application grantedgrantedCritical
Publication of IT1105907BpublicationCriticalpatent/IT1105907B/en
IT50371/78A1977-07-211978-07-19
PROCEDURE FOR THE PRODUCTION OF POSITIVE COLOR IMAGES MASKED ACCORDING TO THE SILVER COLOR WHITENING PROCEDURE
IT1105907B
(en)