公开(公告)号：US3819382A

公开(公告)日：1974-06-25

申请号：US15604771

申请日：1971-06-23

Applicant: AGFA GEVAERT AG

Inventor： ROOS E ,  LEY K ,  KOENIG A ,  KAMPFER H

IPC: G03C1/42 ,  G03C1/498 ,  G03C8/06 ,  G03C1/02

CPC classification number: G03C1/49827 ,  G03C1/42 ,  G03C8/06

Abstract: Light-sensitive photographic material having reducible metal compound that forms metal nuclei when exposed to light, and also has reducing agent incorporated in it to form an image when processed without an external developer, shows greater storage stability when the reducing agent is selected from certain hydroxy chromans and coumaranes. The reducible metal compound can be a compound of silver or other Group Ib metal, and can be formed in situ from a non-light sensitive silver salt.

Abstract translation: 具有可暴露于光下形成金属核的可还原金属化合物的光敏感光材料，当没有外部显影剂加工时，还含有并入其形成图像的还原剂，当还原剂选自某些羟基 苯并二氢吡喃和香豆素。 可还原金属化合物可以是银或其它Ib族金属的化合物，并且可以由非光敏银盐原位形成。

公开(公告)号：US3762926A

公开(公告)日：1973-10-02

申请号：US3762926D

申请日：1971-01-05

Applicant: AGFA GEVAERT AG

Inventor： HIMMELMANN W ,  ROOS E ,  SOBEL J

IPC: C07C45/27 ,  C07C45/42 ,  C07C45/43 ,  C07C45/51 ,  C07C45/67 ,  C07C45/71 ,  C07C47/55 ,  C07C47/565 ,  C07C47/575 ,  G03C1/30

CPC classification number: G03C1/301 ,  C07C45/27 ,  C07C45/42 ,  C07C45/43 ,  C07C45/515 ,  C07C45/673 ,  C07C45/71 ,  C07C47/55 ,  C07C47/565 ,  C07C47/575

Abstract: Trimesic aldehydes, which are substituted in the 2-,4- and 6position with chlorine, hydroxy or methoxy, as well as hexamethyl acetals and bisulfite addition products of such aldehydes are useful for hardening gelatin layers especially photographic gelatin layers. The hardening effect is developed by rendering alkaline the gelatin that contains any of these aldehydes.