ASTM D6583-13

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of the standard as published by ASTM is to be considered the official document.
Designation: D6583 − 04 (Reapproved 2010) D6583 − 13
Standard Test Method for
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Porosity of Paint Film by Mineral Oil Absorption
This standard is issued under the fixed designation D6583; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method is applicable to air-dry architectural coatings of any type, both solvent and water-borne, and of any color,
dark as well as light. It cannot be used with films that are dissolved or excessively softened by mineral oil, but practical examples
of such films will be encountered rarely, if ever.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information
only.standard. No other units of measurement are included in this standard.
1.3 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
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2.1 ASTM Standards:
D1475 Test Method For Density of Liquid Coatings, Inks, and Related Products
D2369 Test Method for Volatile Content of Coatings
D3258 Test Method for Porosity of White or Near White Paint Films by Staining
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 Definitions:
3.1.1 porosity, n—presence of numerous minute voids in a cured material; that is, the fraction of air by volume in the dry film.
4. Summary of Test Method
4.1 The test paint is applied to a preweighed nonporous panel, air dried, then reweighed to obtain the weight of the film.
4.2 Mineral oil is applied to the surface of the paint film, allowed to absorb for a fixed period of time, and the excess removed
in a specified manner. The test panel is then reweighed to determine the amount of mineral oil absorbed.
4.3 Porosity is calculated from the weight ratio of absorbed oil to dry paint film and from previously determined values of
non-volatile and density for the whole paint.
5. Significance and Use
5.1 The porosity of a paint film is closely related to the important practical characteristics of stain resistance, abrasion resistance,
durability, and the hold-out of any paint subsequently applied.
5.2 This test provides a precise means for evaluating and comparing the quality of paint films, insofar as it pertains to porosity
as determined on a coating applied to a nonporous substrate. Porosity measured using this test method may not be an accurate
predictor of coating porosity when the coating is applied to substrate of higher absorption characteristics.
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This test method is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.42 on Architectural Coatings.
Current edition approved Feb. 1, 2010Nov. 1, 2013. Published February 2010December 2013. Originally approved in 2000. Last previous edition approved in 20042010
as D6583 – 04.D6583 – 04 (2010). DOI: 10.1520/D6583-04R10.10.1520/D6583-13.
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volume information, refer to the standard’s Document Summary page on the ASTM website.
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D6583 − 13
5.3 Unlike current Test Method D3258 Porosity of Paint Films, which is effective only with light colored paints, this test method
is equally effective with paints of any color, both dark and light. Also unlike Test Method D3258, its results are not influenced by
the hiding characteristics of the paint film.
6. Apparatus and Materials
6.1 Bird Type Film Applicator, 150-mm wide with a clearance of 150 μm.
6.2 Bird Type Film Applicator, 150-mm wide with a clearance of 100 μm.
6.3 Vacuum Drawdown Plate.
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6.4 Test Panel.
6.5 Mineral Oil, specific gravity 0.8200 to 0.8350; viscosity 6.5 to 7.8 cSt at 40°C.
6.6 Absorbent Wipers.
7. Procedure
7.1 Weigh each test pa
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