AZOGRAPH
CARBON SHEETS HAVING A TRANSFER COATING FOR USE IN A PROCESS WHEREIN A DYE FORMING COMPONENT TRANSFERRED FROM THE CARBON SHEET TO A MASTER TO FORM AN IMAGE IS TRANSFERRED FROM THE IMAGE MASTER FOR REACTION TO FORM THE DYESTUFF IN COPY SHEETS TO PRODUCE MULTIPLE COPIES
Expired · November 9, 1953 · 71656059 ·
