发明名称 |
Increased activity precipitated photographic materials |
摘要 |
The invention is accomplished by providing an aqueous dispersion of a photographic coupler by precipitation from a solvent solution by solvent and/or pH shift. A second aqueous dispersion of an activating permanent solvent for the photographic coupler is also provided. The dispersion of activating permanent solvent and photographic coupler are combined to form a combined dispersion which is mixed with a gelatin dispersion of silver halide particles to form a photographic emulsion suitable for casting as a photographic element. In a preferred method of the invention, the activating solvent is incorporated into a dispersion of latex particles prior to being combined with the dispersion of photographic coupler.
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申请公布号 |
US5008179(A) |
申请公布日期 |
1991.04.16 |
申请号 |
US19890440160 |
申请日期 |
1989.11.22 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
CHARI, KRISHNAN;BOWMAN, WAYNE A.;THOMAS, BRIAN |
分类号 |
G03C7/32;G03C7/34;G03C7/36;G03C7/384;G03C7/388 |
主分类号 |
G03C7/32 |
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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