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GB/T 40173-2021 English PDF (GBT40173-2021)

GB/T 40173-2021 English PDF (GBT40173-2021)

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GB/T 40173-2021: Determination of reducing-end sugar in water-soluble chitosan - Spectrophotometric method
This Standard specifies the accelerated ageing method of printing paper and writing paper at 100 ??C, and, by evaluating the impact of ageing treatment on the two physical properties of the paper, namely folding number and tearing resistance, predicts the effect of long-term natural ageing process on paper stability. This Standard applies to all kinds of printing paper and writing paper, including coated paper and filled paper.

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