ASTM WK48611

    New Test Method for Evaluating the Performance of Antimicrobials in or on Polymeric Non-Solids Against Staining by Streptomyces species (A Pink Stain Organism)

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    Developed by Subcommittee: E35.15 | Committee E35 | Contact Staff Manager


    1. Scope

    1.1 This method is intended to assess susceptibility of foam and other non-solid polymer products as well as products that may directly contact vinyl to pink-staining by the actinomycete bacteria Streptomyces species. 1.2 This test method is suitable for evaluating dark-pigmented test samples. 1.3 A knowledge of microbiological techniques is recommended for these procedures. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    Antimicrobials Polymeric Non-Solids Staining by Streptomyces Pink Stain


    When certain bacteria and mold species grow on the surface of non-rigid flexible or plasticized polymers, metabolites such as pigments in the case of certain bacteria and melanin (dark stains from fungal growth) cause undesirable stains on the polymer surface. Theses stains may persist even after the surface growth is removed. This test method is used for determining the performance of antimicrobial agents used in or on synthetic polymeric non solids against pink-staining by the actinomycete, Streptomyces species. This organism has been chosen as an indicator organism, although other organisms have been known to cause undesirable staining in polymeric non solids.

    The title and scope are in draft form and are under development within this ASTM Committee.

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    Work Item Status

    Date Initiated:

    Technical Contact:
    Leon Estell

    Draft Under Development