BS EN ISO 5350-2-2006 纸浆.污物和碎片的测定.磨碎的片状纸浆的检测

标准号：BS EN ISO 5350-2-2006
中文标准名称：纸浆.污物和碎片的测定.磨碎的片状纸浆的检测
英文标准名称：Pulps - Estimation of dirt and shives - Inspection of mill sheeted pulp by transmitted light
标准类型：Y31
发布日期：2006/10/31 12:00:00
实施日期：2006/10/31 12:00:00
中国标准分类号：Y31
国际标准分类号：85.040
适用范围：This part of ISO 5350 specifies a method for tne estimation by transmitted light of the visible dirt and shives in pulp manufactured in sheets. It does not apply to unbleached kraft pulps or to any other sheeted pulps that are too opaque to allow for the estimation of the minimum size or for minimum contrast specks to be counted, in accordance with this part of ISO 5350. The maximum grammage for most pulp sheets is in the range 800 g/m2 to 1 000 g/m2. If the sheets of the mill sheeted pulp have high grammage or are very opaque for other reasons, ISO 5350-1 should be applied. NOTE For thick sheets, with highly textured surfaces and/or with density variations, wetting the sheet will cause optical variations, called lens distortions, that will distort the perceived size of a dirt speck, thus reducing the precision of the size estimation. Alternatively, use ISO 5350-1 to disintegrate the sheet and to prepare laboratory sheets for the size estimation. This part of ISO 5350 is not intended for recycled pulp.