ASTM D6020 - 00(2010)

    Standard Practice for Calculation of (Non-Mineral) Combined Tanning Agents and Degree of Tannage

    Active Standard ASTM D6020 | Developed by Subcommittee: D31.01

    Book of Standards Volume: 15.04


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    Significance and Use

    This practice may be used to determine non-protein or non-nitrogen containing organic matter in leather which is not extractable with water or hexane. Examples would be vegetable tannins and acrylic lubricants.

    1. Scope

    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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D2868 Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather, Wet Blue and Wet White

    D2875 Test Method for Insoluble Ash of Vegetable-Tanned Leather

    D2876 Test Method for Water-Soluble Matter of Vegetable-Tanned Leather

    D3495 Test Method for Hexane Extraction of Leather


    ICS Code

    ICS Number Code 59.140.10 (Processes and auxiliary materials)

    UNSPSC Code

    UNSPSC Code 31221603(Organic tanning extracts of vegetable origin)


    Referencing This Standard

    DOI: 10.1520/D6020-00R10

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D6020-00(2010), Standard Practice for Calculation of (Non-Mineral) Combined Tanning Agents and Degree of Tannage, ASTM International, West Conshohocken, PA, 2010, www.astm.org

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