- 专利标题: Opaque developing composition and its use to process roomlight handleable black-and-white photographic elements
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申请号: US46447申请日: 1998-03-23
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公开(公告)号: US5908737A公开(公告)日: 1999-06-01
- 发明人: Alan S. Fitterman , Robert E. Dickerson
- 申请人: Alan S. Fitterman , Robert E. Dickerson
- 申请人地址: NY Rochester
- 专利权人: Eastman Kodak Company
- 当前专利权人: Eastman Kodak Company
- 当前专利权人地址: NY Rochester
- 主分类号: G03C5/26
- IPC分类号: G03C5/26 ; G03C1/005 ; G03C1/36 ; G03C1/46 ; G03C1/83 ; G03C5/16 ; G03C5/30 ; G03C5/305 ; G03C5/38
摘要:
Black-and-white elements, such as radiographic films, can be processed in roomlight because the developing composition includes a particulate opacifying agent, such as carbon black. Processing is carried out by processing the exposed element using a two-stage process in the same processing container. In the first stage, development is initiated with an opaque developing composition having a pH of from about 10 to about 12.5, and comprising an appropriate black-and-white developing agent in a concentration of from about 0.1 to about 0.5 mol/l, opacifying agent, and a sulfite at from about 0.1 to about 0.7 mol/l. After an appropriate time, a fixing agent (other than a sulfite) is introduced into the processing container to begin simultaneous development and fixing. The entire process in quite rapid, that is less than 90 seconds.
公开/授权文献
- USD378642S Liquid dispenser 公开/授权日:1997-04-01