Ink and method for the development of concealed images

Details Ink and method for the development of concealed images Ink and method for the development of concealed images

1988-10-03

1991-05-21

Dixon, Jr., William R.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 19, 106 145, C09D 1100

Patent

active

050172263

ABSTRACT:
Disclosed is a system for developing latent images on alkali-based or acid-based paper stock which has been marked with a water-soluble oxidizing agent to form a concealed image. In the system, a marking composition is applied to said paper stock which comprises

REFERENCES:
patent: 3620744 (1971-11-01), Schellenberg et al.
patent: 3632364 (1972-01-01), Thomas et al.
patent: 3788863 (1974-01-01), Scheuer
patent: 4051283 (1977-09-01), Thomas et al.
patent: 4853321 (1989-08-01), Momoki et al.

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