CAN/CGSB-9.0 No./No.5-1993

Methods of Testing Pulp and Paper Brightness of Pulp, Paper and Paperboard

CAN/CGSB-9.0 No./No.5-1993 发布历史

CAN/CGSB-9.0 No./No.5-1993由SCC 发布于 1993-09-30。

CAN/CGSB-9.0 No./No.5-1993在国际标准分类中归属于: 85.060 纸和纸板。

CAN/CGSB-9.0 No./No.5-1993 的最新版本是哪一版？

最新版本是 CAN/CGSB-9.0 No./No.5-1993 。

CAN/CGSB-9.0 No./No.5-1993的历代版本如下：

• 1993年 CAN/CGSB-9.0 No./No.5-1993

1.1 Absolute brightness is defined as the reflectance of blue light with a specified spectral distribution peaking at 457 nm compared to that of a perfectly reflecting, perfectly diffusing surface. Although no physical material has such a surface, the discrepancies between a reference material and the perfect diffuser can be rigorously determined. Reference materials thus calibrated establish the scale of absolute brightness. 1.2 Bleaching agents strongly influence the reflectance of pulp in this portion of the spectrum. Absolute brightness is thus used to monitor bleaching action. The method is not intended to be solely definitive in the case of materials having a pronounced color (Note 1) or containing optical brighteners. 1.3 Since the method utilizes an integrating sphere geometry, it may be used with materials having relatively rough surfaces. The specular component is excluded. The use of a relatively large sample aperture averages out point to point differences and minimizes the number of measurements necessary.

标准号

CAN/CGSB-9.0 No./No.5-1993

发布

1993年

发布单位

SCC

当前最新

CAN/CGSB-9.0 No./No.5-1993

 

 

代替标准

85.060 85.040

被代替标准

BOARD (PAPER), BRIGHTNESS (OF COLOUR), GEOMETRY, OPTICAL PROPERTIES OFMATERIALS, PAPER, PAPER PULP, REFLECTANCE FACTOR, SPECTROPHOTOMETRY, TESTEQUIPMENT, TEST SPECIMENS, TESTING, TESTING CONDITIONS, WAVELENGTHS

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