Dye-forming electrically activatable recording element and proce

Details Dye-forming electrically activatable recording element and proce Dye-forming electrically activatable recording element and proce

1986-06-04

1988-02-23

Goodrow, John L.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

To produce color reproduction

430 45, 430351, 430502, 430629, G03G 1524, G03G 1322

Patent

active

047270080

ABSTRACT:
A dye-forming electrically activatable recording (EAR) element which is capable of forming at least two dye images comprises an electrically conductive support bearing on one side of the support at least a dye-forming layer (A) responsive to negative polarity charge exposure and at least one dye-forming layer (B) responsive to positive polarity charge exposure and, optionally, other dye-forming layers. A multicolor dye image can be formed in the dye-forming electrically activatable recording element by multistep imagewise charge exposure in which the exposure steps are reversed in electrical polarity at each step. The reversal of polarity of exposure at differing charge density levels enables formation of a dye image in at least one layer without formation of a dye image in another layer. Processing of the exposed dye-forming electrically activatable recording element is carried out by thermal processing or by means of processing solutions or baths.

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patent: 4410614 (1983-10-01), Lelental et al.
patent: 4435490 (1984-03-01), Lelental et al.
Research Disclosure, Dec. 1978, Item No. 17643.
Research Disclosure, Jul. 1986, Item No. 14719.

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