发明授权
- 专利标题： Black and white paper with variable gradation
- 专利标题（中）： 具有可变灰度的黑白纸
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申请号： US681270申请日： 1996-07-22
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公开(公告)号： US5665532A公开(公告)日： 1997-09-09
- 发明人: Manfred Peters , Thomas Kaluschke , Hans Ohlschlager , Bruno Mucke
- 申请人： Manfred Peters , Thomas Kaluschke , Hans Ohlschlager , Bruno Mucke
- 申请人地址： DEX
- 专利权人： Agfa-Gevaert AG
- 当前专利权人： Agfa-Gevaert AG
- 当前专利权人地址： DEX
- 优先权： DEX19528057.1 19950731; DEX19601141.8 19960115
- 主分类号： G03C1/035
- IPC分类号： G03C1/035 ; G03C1/14 ; G03C1/16 ; G03C1/18 ; G03C1/29
摘要：
A black & white paper with variable gradation containing a silver chloride-bromide emulsion, which is divided into at least three portions, one of which is sensitised with a blue sensitiser and two further portions are sensitised both with differing quantities of blue sensitiser and with differing quantities of a green sensitiser, wherein the blue sensitiser is of the formula (I) and the green sensitiser is of the formula (II) ##STR1## in which R.sub.1 to R.sub.8, X.sup.(-) and m have the meaning stated in the specification, is distinguished by an extended gradation range.
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