Printing process using a pH change to transfer a thin layer of i

Details Printing process using a pH change to transfer a thin layer of i Printing process using a pH change to transfer a thin layer of i

1988-12-21

1990-08-07

Crowder, Clifford D.

Printing

Planographic

Processes of lithographic printing

101491, B41M 106

Patent

active

049458337

ABSTRACT:
A printing process using an ink which is substantially non-adhesive but can be imparted with an adhesiveness when subjected to a pH change. In the printing process, the ink is subjected to a pH change to be provided with an adhesiveness to a desired depth, and the resultant adhesive ink is supplied to a printing plate having a pattern of ink receptibility to form thereon an ink pattern corresponding to the ink receptibility pattern. The ink pattern is then transferred to a transfer-receiving medium such as plain paper to form thereon a recorded image. In the above-mentioned printing process, a uniform thin ink layer can be supplied to the printing plate by chemically regulating the amount of the ink to be supplied.

REFERENCES:
patent: 4080897 (1978-03-01), Gundlach
patent: 4336318 (1982-06-01), Fukumoto et al.
patent: 4471694 (1984-09-01), Takasu et al.
patent: 4533614 (1985-08-01), Fukumoto et al.
patent: 4535048 (1985-08-01), Inoue et al.
patent: 4559899 (1985-12-01), Kan et al.
patent: 4838940 (1989-06-01), Ken et al.
patent: 4881084 (1989-11-01), Kan et al.

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