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GB/T 40927-2021 English PDF (GBT40927-2021)

GB/T 40927-2021 English PDF (GBT40927-2021)

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GB/T 40927-2021: Leather -- Physical and mechanical tests -- Determination of heat resistance of patent leather
This Standard describes two test methods for determining the heat resistance of patent leather, respectively, the crack testing machine method (method A) and the and quot;Zwick and quot; instrument method (method B). This Standard is applicable to the determination of heat resistance of various types of patent leather. Other types of coated leather refer to it for the implementation.

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