Invention Grant
- Patent Title: Method for forming direct positive color images
- Patent Title (中): 形成直接正彩色图像的方法
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Application No.: US66049Application Date: 1987-06-23
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Publication No.: US4789627APublication Date: 1988-12-06
- Inventor: Noriyuki Inoue , Tatsuo Heki , Shinji Ueda
- Applicant: Noriyuki Inoue , Tatsuo Heki , Shinji Ueda
- Applicant Address: JPX Minami-ashigara
- Assignee: Fuji Photo Film Co., Ltd.
- Current Assignee: Fuji Photo Film Co., Ltd.
- Current Assignee Address: JPX Minami-ashigara
- Priority: JPX61-154156 19060702; JPX61-149085 19860625
- Main IPC: G03C1/485
- IPC: G03C1/485 ; G03C7/30 ; G03C5/24
Abstract:
In a method for forming a direct positive color image which comprises image-wise exposing to light a light-sensitive material comprising a support having provided thereon at least one photographic emulsion layer contaiing unfogged internal latent image type silver halide grains and a color image-forming coupler; developing the light-sensitive material with a surface developing solution containing an aromatic primary amine type color developing agent in the presence of a nucleating agent and/or fogging exposure; bleaching and fixing the resulting material to form the direct positive color image, the improvement is characterized in that the developing solution has a pH of 11.5 or less and does not substantially contain benzyl alcohol; the color coupler is a compound which forms or releases a substantially non-diffusive dye by oxidation coupling with a developing agent, and the internal latent image type silver halide grains have a particular core/shell structure.According to the method, a direct positive color image having a high maximum color density and a low minimum image density can be obtained in a short time.
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