Type of modified gelatin and its use in a DTR material

Details Type of modified gelatin and its use in a DTR material Type of modified gelatin and its use in a DTR material

1994-05-26

1995-12-12

Neville, Thomas R.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified backing or protective layer containing

430621, 430623, 430642, 530354, 530402, 530408, 530410, G03C 176

Patent

active

054748852

ABSTRACT:
A modified gelatin is disclosed wherein part of the free carboxyl groups is replaced by modifiers having more acid end-standing groups chosen from --SO.sub.3 M, --OSO.sub.3 M, --SSO.sub.3 M, --OPO(OH).sub.2, --OPO(OH)(OR.sup.2), --PO(OH).sub.2, --PO(OH)(OR.sup.2).
In a preferred embodiment such a modified gelatin is incorporated in a DTR photographic material which after processing can serve as a lithographic printing plate. Thanks to the more hydrophilic character of the modified gelatin the differentiation between printing and non-printing areas is improved and toning at printing start-up is reduced.

REFERENCES:
patent: 2352014 (1944-06-01), Rott
patent: 2525753 (1950-10-01), Yutzy et al.
patent: 3396026 (1968-08-01), Taylor
patent: 3539353 (1970-11-01), Gates et al.
patent: 3748142 (1973-07-01), Battista
patent: 4497893 (1985-02-01), Deguchi et al.
patent: 5316902 (1994-05-01), Specht et al.

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