Cleaning and liquid contact with solids – Processes – Miscellaneous
Patent
1993-02-09
1995-01-17
Albrecht, Dennis
Cleaning and liquid contact with solids
Processes
Miscellaneous
101424, 101451, 101483, 101492, 134 32, 134 34, 252135, 252136, 252139, 252140, 252143, 252144, 252164, 252173, 25217419, 25217425, 252524, 252525, 252DIG14, B41F 3504, C09D 520, C11D 708, C11D 750
Patent
active
053822986
ABSTRACT:
Press component cleansing and desensitizing treatment solutions contain (A) about two percent to about thirty percent by weight of a liquid humectant, (B) about one percent to about twenty-five percent by weight of a buffer which can include a trace amount of phosphoric, lactic or citric acid to stabilize pH, (C) about two point five percent to about twenty-five percent by weight of a liquid constituent selected from the group consisting of ethylene glycol monobutyl ether and propylene glycol n-butyl ether, and (D) about point two percent to about seven point five percent by weight of a non-soluble pulverant solid with a particle size of about three to about five micrometers; and, in such solutions, about one to about twenty-five percent by weight of an amine can be substituted for an alcohol, or about point two percent to about five percent by weight mineral spirits can be substituted in place of alcohols and/or amines, with the balance water; further, about point two percent to about five percent by weight gum arabic can be added for extending desensitizing effectiveness. Such treatment solutions help to maintain image clarity, enable planned interruption of press runs and restart without requiring re-registry procedures, and, also, avoid significant disturbance to selections of fountain solutions and printing inks made for compatibility with equipment or materials during a press run.
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Albrecht Dennis
Baker Raymond N.
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