ASTM C724 Acid Resistance of Ceramic Decoration on Architectural Glass

ASTM C724 test method is used in analyzing the quality and ease of maintenance of a ceramic decoration on architectural- type glass. This test method is useful in the acknowledgment of technical standards.... Read More

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    Scope:

    ASTM C724 test method is used for determining the acid resistance of ceramic decoration on architectural glass in a qualitative manner. This test method qualitatively evaluates the degree of attack upon a ceramic decoration by a 10% citric acid solution and a nominal 3.7 % hydrochloric acid solution by visual assessment. This test method also provides an easy objective test that can be used during the production of the glassware.

    Test Procedure:

    For ASTM C724, four drops of each acid solution are dropped in a separate spot on the surface of the ceramic decoration to be tested. A watch glass is placed above each location to prevent evaporation and contamination. The test acid solution is left on the test specimen’s surface for about 15 minutes at 20°C ± 2°C. The acid solutions are rinsed off the test specimen with tap water and the test specimen is air-dried after 15 minutes of exposure.

    Specimen Size : 

    A typical architecture-type glass with ceramic decorations is used as an ASTM C676 test specimen. 

    Data:

    Analysis of the intensity of attack for ASTM C724 testing is done by using the following set of criteria:

    ▪ No signs of an attack.
    ▪ When viewed at a 45° angle, there is an appearance of stain on the surface, although it is not visible if the angle is less than 30°.
    ▪ A distinct stain that does not distort reflected light.
    ▪ Surface is dull or matte, with the possibility of chalking.

    Conclusion:

    ASTM C724 test method is used for determining the acid resistance of ceramic decoration on architectural glass in a qualitative manner.

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