Reactant sheet for developing colorless dye images

Details Reactant sheet for developing colorless dye images Reactant sheet for developing colorless dye images

1967-01-23

1976-01-13

Lusignan, Michael R.

Stock material or miscellaneous articles

Composite

Of aldehyde or ketone condensation product

427145, 427146, 427150, 427152, 427203, 428914, B32B 2708, B32B 2742, B41M 312, B41M 500

Patent

active

039326950

ABSTRACT:
A relatively uniform thin coating of a solid phenolic reactant can be applied to a paper base by contacting said paper base with a thin film of a solution consisting essentially of said phenolic reactant in a volatile organic solvent and immediately evaporating said solvent and, unexpectedly, said phenolic reactant is retained essentially completely on the contacted surface of the paper base. Thusly applied, it has been found that well defined colored marks are formed on the surface of the paper base on marking the surface with a colorless marking ink.

REFERENCES:
patent: 1277904 (1918-09-01), Gesell
patent: 2463501 (1949-03-01), Arvin
patent: 2972547 (1961-02-01), Tien
patent: 3020170 (1962-02-01), Macaulay
patent: 3244549 (1966-04-01), Farnham et al.
patent: 3244550 (1966-04-01), Farnham et al.
patent: 3296965 (1967-01-01), Reif et al.
patent: 3322557 (1967-05-01), Schwab
patent: 3374768 (1968-03-01), Lawes et al.
patent: 3466184 (1969-09-01), Bowler et al.

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