发明名称 |
Process for preparing negative images |
摘要 |
The present invention provides a process for preparing a negative image of high contrast comprising developing an exposed silver halide photographic material which is substantially a surface latent image-type material in the presence of a hydrazine derivative, wherein said material is processed with a water-soluble alkaline developer having a pH value of from 10.5 to 12.3 and at least comprising the following components (1) through (3): (1) a dihydroxybenzene-type developing agent; (2) 0.3 mole/liter (developer) or more of a sulfite preservative; and (3) from 0.01 to 0.30 mole/liter (developer) of a compound of formula (A) <IMAGE> (A) in which R2 represents an alkyl group having from 3 to 6 carbon atoms; R3 and R4 each represents an alkyl or hydroxyalkyl group having from 1 to 10 carbon atoms. The formed negative images are of high contrast and are almost free from silver stain. The sensitivity is high and the dot image quality is good.
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申请公布号 |
US4740452(A) |
申请公布日期 |
1988.04.26 |
申请号 |
US19860865695 |
申请日期 |
1986.05.22 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
OKUTSU, EIICHI;HIRANO, MITSUNORI |
分类号 |
G03C5/30;G03C5/29;G03C5/305;(IPC1-7):G03C5/30 |
主分类号 |
G03C5/30 |
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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