发明授权
- 专利标题: Multi-part photographic color developing composition and methods of manufacture and use
-
申请号: US09861695申请日: 2001-05-21
-
公开(公告)号: US06436618B1公开(公告)日: 2002-08-20
- 发明人: Jean M. Buongiorne , Charles M. Darmon , Michael J. Haight , Erika S. McLarney , Barry C. Kocher , Sheridan E. Vincent , Charles S. Christ, Jr.
- 申请人: Jean M. Buongiorne , Charles M. Darmon , Michael J. Haight , Erika S. McLarney , Barry C. Kocher , Sheridan E. Vincent , Charles S. Christ, Jr.
- 主分类号: G03C7413
- IPC分类号: G03C7413
摘要:
A multi-part color developing kit includes at least two parts (or solutions) of photochemical compositions that can be mixed to provide a color developing composition useful for obtaining color photographic images. A first aqueous solution is formulated with a color developing agent in free base form, an antioxidant for the color developing agent, an inorganic base, a triazinylstilbene optical brightening agent, an chemical base and a water-miscible or water-soluble hydroxy-substituted, straight-chain organic solvent. A second aqueous solution is formulated with a buffering agent, the same or different chemical base and a phosphonic acid metal ion sequestering agent. Both solutions have a pH and homogeneity to provide a clear color developing composition that is safer for use and disposal.
公开/授权文献
信息查询