Paper—Determination of transmittance—Diffuse reflectance measurement
全国造纸工业标准化技术委员会(SAC/TC 141)
GB/T 2679的本部分规定了采用漫反射法测定纸的透明度的方法。
本部分适用于白色和接近白色的半透明纸。若要测定含有荧光增白剂的纸时，使用紫外截止滤光片消除荧光的激发。
注： 虽然GB/T 7973允许使用滤光片式反射光度计和简易分光反射光度计，但如果滤光片式反射光度计不能消除荧光的激发，则不适合用于测试含有荧光增白剂的纸的透明度。
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