- 专利标题: Direct positive image-forming process
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申请号: US153519申请日: 1988-01-29
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公开(公告)号: US4840879A公开(公告)日: 1989-06-20
- 发明人: Atushi Kamitakahara , Keiji Ogi
- 申请人: Atushi Kamitakahara , Keiji Ogi
- 申请人地址: JPX Tokyo
- 专利权人: Konishiroku Photo Industry Co., Ltd.
- 当前专利权人: Konishiroku Photo Industry Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX57-22507 19820112
- 主分类号: G03C1/485
- IPC分类号: G03C1/485 ; G03C5/50 ; G03C7/392
摘要:
The present invention relates to a process for forming a direct positive color image comprising(a) imagewise exposing a direct positive photosensitive silver halide color photographic material to light to yield an imagewise exposed material, said photographic material having a support and at least one silver halide emulsion layer thereon, said emulsion layer containing a coupler and internal latent image type silver halide crystals whose surfaces have not been fogged prior to said imagewise exposure, and(b) uniformly exposing to light the entire surface of said imagewise exposed photographic material before or during a development step and in the presence of a substance of Formula IV, a compound of formula I and a color-developing agent consisting of aromatic primary amino compounds selected from the group consisting of N-methyl-aminophenol, 4-amino-3-methyl-N-ethyl-N-(-methanesulfonamidoethyl) aniline,4-amino-3-methyl-N-ethyl-N-(-hydroxyethyl) aniline, 4-amino-3-methyl-N, N-diethyl-p-phenylenediamine, and 4-amino-3-methyl-N-ethyl-N- -methoxyethyl-p-phenylenediamine; wherein the oxidized products thereof form a coupling reaction with said couplers to produce dyes, ##STR1## wherein R.sub.1 is selected from hydrogen, alkyls of 1 to 4 carbon atoms which are substituted or unsubstituted, and aryls which are substituted or unsubstituted; R.sub.2 -R.sub.5 are individually selected from the same group as R.sub.1 and hydroxyl; ##STR2## wherein R.sub.14 and R.sub.15 are individually selected from hydrogen, alkyls having 1 to 4 carbon atoms which may be substituted or unsubstituted, aryl groups which may be substituted or unsubstituted and non-metal atoms necessary for linking R.sub.14 and R15 in such a manner as to create a 5 or 6 membered ring, and R.sub.16 is selected from hydrogen, alkyls having 1 to 4 carbon atoms which may be substituted or unsubstituted, and aryl groups which may be substituted, and wherein said exposed photographic material is processed in a prebath or a color developer containing 10 mg/1 to 10 g/l of said formula [I] compound.
公开/授权文献
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