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ASTM D6020-00
M00000991
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ASTM D6020-00 Standard Practice for Calculation of (Non-Mineral) Combined Tanning Agents and Degree of Tannage
standard by ASTM International, 09/10/2000
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1.1 This practice covers the determination of the combined tannin and nonextractable organic resins and the degree of tannage of all types of vegetable-tanned leather and leather with organic retannages. This practice does not apply to wet blue.