B - Operations – Transporting – 41 – M
Patent
B - Operations, Transporting
41
M
42/1, 204/2
B41M 5/20 (2006.01) B41C 1/10 (2006.01)
Patent
CA 1250249
ABSTRACT OF THE DISCLOSURE A method of printing by electrolytic coagulation, using an improved colloid solution in association with a dyed colloid swelling agent which permits improved dye transfer from dyed coagulated images to enable very fast and accurate printing on ordinary paper. The dyed colloid swelling agent is rapidly absorbed by the coagulated colloid for dye transfer on any paper surface wetted with a paper wetting agent which is a solvent of the colloid swelling agent. The colloid is of reliable uniform quality and performance and is used in combination with a salt or acid to render the solution conductive. The colloid is selected from the group of linear synthetic colloids of high molecular weight, including polyacrylic acid and polyacrylamide resin. The swelling agent is selected from the group consisting of glycerol, sorbitol, ethylene glycol, formamide and N-methyl pyrrolydone. The paper wetting agent is selected from the group consisting of methyl alcohol, ethyl alcohol, isopropyl alcohol, and acetone.
480015
Castegnier Adrien
Martineau Francois
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