Composition for forming colored images, new recording material a

Details Composition for forming colored images, new recording material a Composition for forming colored images, new recording material a

1975-12-02

1977-10-18

Hoffman, James R.

Coating processes

Electrical product produced

Welding electrode

106 21, 427 56, 427145, 427256, 427287, 427288, 428341, 428342, 428446, 428450, 428452, 428469, 428472, 428537, 428539, 428913, C09D 1100, B05D 306, B05D 312

Patent

active

040546845

ABSTRACT:
The photochromic activity of triphenylmethane paraamino leuco salts is reversibly inactivated in compositions containing the leuco salt with certain metallic oxides or sulfides. The photochromic properties of the leuco salts are restored by the application of energy, e.g. heat, mechanical pressure, etc. The sensitive compositions containing the leuco salt and metal oxide or sulfide are useful in a process for recording information according to a predetermined pattern by applying a local heat source or local pressure source to a recording material containing a layer of the sensitive composition, the application of energy resulting in the formation of colored marks corresponding to the information to be recorded.

REFERENCES:
patent: 3674535 (1972-07-01), Plose et al.
patent: 3843384 (1974-10-01), Adachi et al.
patent: 3895173 (1975-07-01), Adachi
patent: 3950600 (1976-04-01), Knirsch et al.
patent: 3952129 (1976-04-01), Matsukawa et al.

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