Recorders – Record receiver deforming
Patent
1982-12-23
1984-05-15
Hess, Bruce H.
Recorders
Record receiver deforming
427150, 4284111, 428914, 260391, B41M 522
Patent
active
044484461
ABSTRACT:
Triphenylmethane dyes are obtained in a purified or more concentrated condition which eliminates the excess aromatic amines and by-products obtained during the synthesis of the triphenylmethane dyes. These purified triphenylmethane dyes show special utility when used in combination with an electron acceptor (Lewis acid) to produce carbonless copy paper or when used as reactants in the manufacture of other dyes.
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The Chemistry of Synthetic Dyes and Pigments, edited by H. A. Lubs 1955, pp. 274-289.
Hess Bruce H.
McDonald Robert E.
The Sherwin-Williams Company
Tura James V.
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