ASTM C949 - 80(2012)

    Standard Test Method for Porosity  in  Vitreous  Whitewares  by  Dye  Penetration

    Active Standard ASTM C949 | Developed by Subcommittee: C21.03

    Book of Standards Volume: 15.02


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    ASTM C949

    Significance and Use

    This test method provides a means for readily determining if a ceramic is properly fired (matured). Penetration of any extent may negate the usefulness of the ceramic, or, arbitrarily, some degree of penetration may be acceptable for the use or commercial quality of the item being tested.

    1. Scope

    1.1 This test method covers procedures for detecting pores, cracks, or other voids that may be present in otherwise impermeable whiteware ceramics, or as porosity in underfired ware.

    Note 1—This test method was partially derived from ANSI C29.1.

    1.2 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


    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

    C242 Terminology of Ceramic Whitewares and Related Products

    ANSI Standard

    C 29.1 Test Methods for Electrical Power Insulators Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.


    ICS Code

    ICS Number Code 81.060.20 (Ceramic products)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/C0949-80R12

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