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    GB/T 36899-2018
    Fluorescent whitening agents—Determination of yellow spots

    GB/T 36899-2018 "Fluorescent Whitening Agents—Determination of Yellowing Point" is applicable to fluorescent whitening agents used for cotton, nylon, and paper. It specifies the method for determining their yellowing point. Using a whiteness meter and an analytical balance, at least five samples with different depths are dyed at specific intervals. After dyeing on the corresponding substrate, the whiteness value of each dyed sample is measured, and a relationship curve is plotted. The dyeing depth corresponding to the maximum whiteness value is taken as the yellowing point. The standard defines dyeing conditions, interval selection, and result determination criteria, providing a basis for controlling the dosage of fluorescent whitening agents.

    This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
    Status Active
    CCS G55 ICS 71.100.01;87.060.10
    Release Date 2018-12-28 00:00:00 Implementation Date 2019-11-01 00:00:00

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