ASTM D7514 Ink Stain blocking of Architectural Paint Systems

ASTM D7514 Ink Stain blocking of Architectural Paint Systems

ASTM D7514 gives a procedure for assessing the capacity of a structural paint framework to impede ink stains from markers and writing instruments from seeping through a primer into a topcoat. The qualities expressed in SI units are considered as standard.

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    Scope:

    Paint organizations and natural substance providers utilize ASTM D7514 to evaluate the viability of inside building introductions for hindering stains from seeping through to a topcoat. Diverse ink-stained substrates might give different outcomes for stain-impeding execution for a groundwork and topcoat framework. This test technique might be utilized for several various ink-stained surfaces.

    Procedure:

    In ASTM D7514, a substrate that is generally a painted surface or an uncoated building material, is stained utilizing a progression of ink composing executes. The stained substrate is covered with the test paints and permitted to dry for a predetermined stretch. The test paints are top-covered with divider paint, and the test paint/topcoat framework is assessed for stain-hindering adequacy.

    Video 01: ASTM D7514 Ink stain blocking

    Specimen size:

    A film tool, such as a drawdown bar, is used to apply a wet film of thickness 0.075 to 0.100 mm (3 to 4 mil). The base film width varies case-by-case and is dependent on the test region to be covered. 

    Result 

    In ASTM D7514 testing, the report mentions the average overall score of every individual stain. The complete score depends on the summation of midpoints for each composing instrument (a limit of 40 focuses when four sorts of composing instruments are utilized).

    Conclusion:

    Paint organizations and natural substance providers utilize ASTM D7514 to evaluate the viability of inside building introductions for hindering stains from seeping through to a topcoat.

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