Sheet printed with invisible inks, developers and erasure compou

Details Sheet printed with invisible inks, developers and erasure compou Sheet printed with invisible inks, developers and erasure compou

1982-03-02

1984-10-16

Hess, Bruce H.

Recorders

Record receiver deforming

283 98, 283901, 428 29, 428199, 428916, 346202, 346204, 346206, B41M 314, B41M 514

Patent

active

044775938

ABSTRACT:
The invention relates to a developable surface comprising a carrier layer having thereon at least two deposits of one or more invisible inks in adjacent or overlapping relationship, said deposits in the developed state being unresolvable.

REFERENCES:
patent: 3364052 (1968-01-01), Martino
patent: 3852094 (1974-12-01), Yarian
patent: 4101690 (1978-07-01), Miyamoto et al.
patent: 4199618 (1980-04-01), Golden

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