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13 条记录 (耗时 0.015 秒)

    A process for preparing negative images
    11.
    发明公开
    A process for preparing negative images 失效
    一种用于制造负像的过程。

    公开(公告)号：EP0203521A2

    公开(公告)日：1986-12-03

    申请号：EP86106939.1

    申请日：1986-05-22

    申请人： FUJI PHOTO FILM CO., LTD.

    发明人： Okutsu, Eiichi ,  Hirano, Mitsunori

    IPC分类号： G03C5/30

    CPC分类号： G03C5/305 ,  Y10S430/15

    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)
    in which R 2 represents an alkyl group having from 3 to 6 carbon atoms; R 3 and R 4 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 and the dot image quality is good.