B - Operations – Transporting – 41 – N
Patent
B - Operations, Transporting
41
N
400/1347
B41N 3/00 (2006.01) B41N 3/08 (2006.01)
Patent
CA 1296119
ABSTRACT OF THE INVENTION A lithographic fountain solution concentrate is disclosed, the essential components of which comprises an aqueous mixture of: a) from about 0.1 to about 1.5 percent by weight of a water soluble film forming hydrophilic gum; b) from about 0.75 to about 8.5 percent by weight of Polyvinyl Pyrrolidone; c) from about 5.0 to about 30.0 percent by weight of a water soluble acid etchant; d) from about 20.0 to about 50.0 percent by weight of a water soluble or water miscible glycol; and e) from about 0.01 to about 1.25 percent by weight of a phosphate/phosphoric acid buffer system. The concentrate is adapted for further dilution by water to yield a fountain solution which when used in the printing process offers decreased scumming and blinding of printing plates while at the same time permitting a reduction in the amount of water applied to the plate. Improved print quality, reduced tendency to wet the paper, faster ink drying and improved ink/water balance is thereby achieved.
539685
Gventer Henry W.
Hamilton Raymond
American Hoechst Corporation
Fetherstonhaugh & Co.
Gventer Henry W.
Hamilton Raymond
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