Method for making improved lithographic printing plate

Details Method for making improved lithographic printing plate Method for making improved lithographic printing plate

1982-06-21

1984-06-12

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Transfer procedure between image and image layer, image...

Diffusion transfer process, element, or identified image...

430302, G03C 554, G03F 702

Patent

active

044542160

ABSTRACT:
A lithographic printing plate with a markedly improved printing endurance is obtained by the silver complex diffusion transfer process when the diffusion transfer development treatment is carried out in the presence of at least one thione compound having a non-enolizable thione group, an adjacent nitrogen atom with an attached substituent R and represented by >N-R, and a group of atoms selected from carbon, nitrogen, oxygen and sulfur atoms which may carry the substituent R, said group of atoms being necessary for forming a 5- or 6-membered ring having no aromatic condensed ring, said substituent R having 1 to 3 carbon atoms or no carbon atom.

REFERENCES:
patent: 3068098 (1962-12-01), Williams
patent: 3577240 (1971-05-01), Nishio et al.
patent: 3712818 (1973-01-01), Nittel et al.
patent: 3721559 (1973-03-01), De Haes et al.
patent: 3776728 (1973-12-01), Suzuki et al.
patent: 4297430 (1981-10-01), Kanada et al.
patent: 4309499 (1982-01-01), Takagi et al.

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