发明授权
US3951656A Direct-positive silver halide emulsion fogged with a cyanoborohydride anion 失效
直接卤化银乳剂用氰基硼氢化物阴离子雾化

  • 专利标题: Direct-positive silver halide emulsion fogged with a cyanoborohydride anion
  • 专利标题(中): 直接卤化银乳剂用氰基硼氢化物阴离子雾化
  • 申请号: US486196
    申请日: 1974-07-05
  • 公开(公告)号: US3951656A
    公开(公告)日: 1976-04-20
  • 发明人: Frederick William Millard
  • 申请人: Frederick William Millard
  • 申请人地址: NY New York
  • 专利权人: GAF Corporation
  • 当前专利权人: GAF Corporation
  • 当前专利权人地址: NY New York
  • 主分类号: G03C1/485
  • IPC分类号: G03C1/485 G03C1/28
Direct-positive silver halide emulsion fogged with a cyanoborohydride
anion
摘要:
A method for chemically fogging a silver halide photographic emulsion comprising reacting cyanoborohydride anion with the silver halide thereby forming metallic silver. The cyanoborohydride is preferably in the form of an alkali metal salt. Additionally, the emulsion may optionally include a gold salt.
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