Conversion solutions for planographic masters

Details Conversion solutions for planographic masters Conversion solutions for planographic masters

1976-07-29

1977-08-23

Brown, J. Travis

Gas separation: apparatus

Magnetic separating means

96 33, 106 2, 101465, G03G 1328

Patent

active

040438112

ABSTRACT:
A conversion solution for rendering hydrophilic the zinc oxide resin binder type planographic masters containing 2.0% potassium ferrocyanide, phosphoric acid to produce a pH in the range of 4.1 - 4.2 and a buffering salt of ammonium acid phosphate or sodium acid phosphate to buffer the solution and 4.0% by weight of triethanolamine as a modifying and solvating agent to raise the solubility threshold preventing formation of needle-like crystals that tend to form as water evaporates from the solution, and modify the physical property of crystals that do form to a less-hard structure.

REFERENCES:
patent: 3211686 (1965-10-01), Uber et al.
patent: 3573041 (1971-03-01), Van Engeland
patent: 3661598 (1972-05-01), Rosenberger
patent: 3672885 (1972-06-01), Ort
patent: 3714891 (1973-02-01), VanDusen et al.
patent: 3726823 (1973-04-01), Morishima et al.
patent: 3891439 (1975-06-01), Katz et al.
patent: 3970455 (1976-07-01), Nadeau et al.

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