ASTM WK47162

    Revision of D4821 - 14 Standard Guide for Carbon Black—Validation of Test Method Precision and Bias

    (What is a Work Item?)

    Active Standard: D4821 - 15

    Developed by Subcommittee: D24.61 | Committee D24 | Contact Staff Manager


    1. Rationale

    A new reference material, SRB-8B2, is now available. The properties of this reference material need to be added to D4821 Tables 1, 4, and 5. The ballot is for adding the properties of SRB-8B2 to the tables and revising the tables average and pooled properties accordingly. The entire tables with other reference materials are included for information only to show how SRB-8B2 compares to the other reference materials. The values of the other reference materials are NOT being balloted since they have already been approved on a previous ballot.


    accuracy; ASTM reference blacks; carbon black; continuously monitoring testing; normalization; precision; regression; repeatability; reproducibility; statistical x-charts;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:

    Technical Contact:
    John Bailey


    D24 (14-05)

    Ballot Item Approved as D4821-2015 and Pending Publication