AS/NZS 1301.446s-2005
纸浆和纸的试验方法．纸浆；纸和纸板的蓝光漫反射因数（亮度）的测定

Methods of test for pulp and paper - Measurement of diffuse blue reflectance factor (brightness) of pulp, paper and paperboard

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标准号

AS/NZS 1301.446s-2005

发布日期

2005年04月27日

实施日期

2005年04月27日

废止日期

无

国际标准分类号

85.060

发布单位

澳大利亚标准协会

引用标准

AS/NZS 1301.203 AS/NZS 1301.214 AS/NZS 1301.415 AS/NZS 1301.436 ISO 2470

被代替标准

NZS 1301.446s-1992 AS 1301.446s-1992

适用范围

This Standard sets out a method to measure the diffuse blue reflectance factor (brightness) of pulp, paper and paperboard. The scope of this Standard is limited to pulps, papers and paperboards which are effectively free from materials emitting fluorescent radiation under the conditions of measurement. Such materials are used to enhance the reflectivity of white papers by absorbing ultraviolet radiation and re-emitting it in the blue visible range. 'Effectively free' means that the fluorescent contribution to the diffuse blue reflectance factor is not greater than 0.3% reflectance factor. Samples which contain fluorescent materials may be tested by this procedure using a UV or near-UV cut-off filter to exclude UV radiation from the light reaching the test piece (see Clause 7.3), but in such cases the test result is not indicative of the visual appearance of the sample.

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