Basic dye ink formulations and methods
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United States of America Patent
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Apr 14, 1987
Grant Date -
N/A
app pub date -
Oct 22, 1984
filing date -
Oct 22, 1984
priority date (Note) -
Expired
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Abstract
A printing ink particularly suitable for use in flexographic and letterpresses includes a basic dye, a polyhydric alcohol, water soluble carboxylic acid containing polymer and optionally water, thickeners, corrosion inhibitors and biocides. Preferably the water soluble carboxylic acid containing polymer is a homopolymer or copolymer of acrylic or methacrylic acid. The ink has an extremely high affinity for cellulosic and hemi-cellulosic substrates such as Kraft paper and newspaper. It forms a permanent bond to such substrates but does not easily dry out on the press rollers.
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