Simulated watermark printing system

Details Simulated watermark printing system Simulated watermark printing system

1987-08-31

1989-04-25

Barr, Josephine

Compositions: coating or plastic

Coating or plastic compositions

Marking

106 20, 260DIG38, C09D 1108

Patent

active

048244864

ABSTRACT:
A wet laid watermark of uncoated paper is simulated by the use of a resin or resin-plasticizer mixture dissolved in a slow evaporating, high boiling solvent. A sufficient quantity of the low viscosity solution is printed onto an uncoated paper sheet of stationary grade by a standard flexographic press to penetrate the paper fiber and deposit a non-tacky solid having a refractive index which closely approximates that of cellulose. The resulting image of the print is visible to both faces of the paper sheet.

REFERENCES:
patent: 3978274 (1976-08-01), Blum

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