发明名称 |
Photographic products, diffusion transfer photographic process, and compounds used therefor. |
摘要 |
<p>There is disclosed a diffusion transfer photographic system wherein development of an exposed photosensitive element with an aqueous alkaline processing composition is effected in the presence of a compound represented by the formula <CHEM> wherein X represents the nonmetallic atoms necessary to form a nucleus which completes a 5- or 6-membered heterocyclic moiety on said structure including substituted rings and fused rings; R is H, an alkali metal or a group which is cleavable in a photographic aqueous alkaline processing composition; and R1 is either a group, which has a pKa of from about 7 to 14 which is ionizable to an anion whereby the silver salt of the mercaptan (resulting from cleavage or ionization of -SR) is rendered more soluble in the pH range within which R1 is ionized to an anion than it is below that pH range, or a precursor of such a group.</p> |
申请公布号 |
EP0055858(A2) |
申请公布日期 |
1982.07.14 |
申请号 |
EP19810110833 |
申请日期 |
1981.12.29 |
申请人 |
POLAROID CORPORATION |
发明人 |
MEHTA, AVINASH C.;NAWN, GEORGE H.;TAYLOR, LLOYD D.;BARTELS-KEITH, JAMES R.;BORROR, ALAN L. |
分类号 |
G03C8/00;(IPC1-7):03C5/54;07D257/04;07D521/00 |
主分类号 |
G03C8/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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