ISO 3688-1999 纸浆 蓝光漫反射因数(ISO 亮度)实验室测量用纸页的制备

标准号：ISO 3688-1999
中文标准名称：纸浆 蓝光漫反射因数(ISO 亮度)实验室测量用纸页的制备
英文标准名称：Pulps - Preparation of laboratory sheets for the measurement of diffuse blue reflectance factor (ISO brightness)
标准类型：Y31
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：Y31
国际标准分类号：85.040
适用范围：This International Standard specifies two procedures for the preparation of laboratory sheets prior to measuring the diffuse blue reflectance factor (ISO brightness). One is the traditional procedure based on preparation of sheets in a Buchner funnel using a filter paper or a wire screen. In the other procedure, the sheets are prepared in a standard sheet former (conventional or Rapid Kothen). Details of the subsequent measurement procedure are given in ISO 2470. It is applicable to all wood pulps and to most other types of pulp. Pulps with very long fibres, such as those made from unshortened cotton, flax and similar materials, shall be reduced to a suitable fibre length before testing by this method. This International Standard shall be used in conjunction with ISO 2469 and ISO 2470.