ANSI/TAPPI T425 om-2011 纸张的不透明度(几何15/d,光源A/2度,反射率89％的纸坯和纸基)

标准号：ANSI/TAPPI T425 om-2011
中文标准名称：纸张的不透明度(几何15/d,光源A/2度,反射率89％的纸坯和纸基)
英文标准名称：Opacity of paper (15/d geometry, illuminant A/2 degrees, 89% reflectance backing and paper backing)
标准类型：Y32
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：Y32
国际标准分类号：85.060
适用范围：Opacity is a fundamental optical property of paper as a whole, yet the measurement of opacity is determined by a ratio of reflectance measurements. The opacity of the sheet is influenced by thickness, the amount and kind of filler, degree of bleaching of the fibers, coating, and the like. The utility of bond, writing and book papers is enhanced by a high opacity.