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ASTM D3258-04(2010)e1

(Test Method)

Standard Test Method for Porosity of White or Near White Paint Films by Staining

Standard Test Method for Porosity of White or Near White Paint Films by Staining

ABSTRACT
This test method details the standard procedure for determining the porosity of white or near white mineral spirits insoluble paint film by staining to indicate the degree to which a subsequent coat will penetrate. This test method shall require the use of film applicators, reflectometer, vacuum drawdown plate, camelhair brush, plastic wash bottle, test panel, penetrating medium, and filter paper. The test paint is applied to a nonporous surface, air dried, then measured for reflectance. A special colored penetrating medium is applied, the excess removed in a specified manner, and reflectance measured again. The difference between the two readings indicates the degree of porosity; the smaller the difference, the lower the porosity of the film and the greater its ability to resist penetration.
SCOPE
1.1 This test method covers the determination of the porosity of a white or near white mineral spirits insoluble paint film to indicate the degree to which a subsequent coat will penetrate.
1.2 The texture of the film can affect cleanup that will influence the results of the test. A stain applied to a high-hiding paint will not lower the reflectance as much as the same stain applied to a low-hiding paint of equal porosity. These points must be considered in comparing different paints.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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.

General Information

Status
Historical
Publication Date
31-May-2010
ICS
87.040 - Paints and varnishes
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.42 - Architectural Coatings
Current Stage
Ref Project

Relations

Replaces
ASTM D3258-04 - Standard Test Method for Porosity of White or Near White Paint Films by Staining
Effective Date
01-Jun-2010
Replaced By
ASTM D3258-04(2014) - Standard Test Method for Porosity of White or Near White Paint Films by Staining
Effective Date
01-Dec-2014
Referred By
ASTM D5324-16(2022) - Standard Guide for Testing Water-Borne Architectural Coatings
Effective Date
01-Jun-2010
Referred By
ASTM D6583-13(2019) - Standard Test Method for Porosity of Paint Film by Mineral Oil Absorption
Effective Date
01-Jun-2010

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ASTM D3258-04(2010)e1 - Standard Test Method for Porosity of White or Near White Paint Films by StainingASTM D3258-04(2010)e1 - Standard Test Method for Porosity of White or Near White Paint Films by Staining
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ASTM D3258-04(2010)e1 - Standard Test Method for Porosity of White or Near White Paint Films by Staining
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
´1
Designation: D3258 − 04 (Reapproved2010)
Standard Test Method for
Porosity of White or Near White Paint Films by Staining
This standard is issued under the fixed designation D3258; 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.
´ NOTE—Section 2 and 4.3 – Test Method E97 was withdrawn and replaced by Test Method E1347 in June 2010.
1. Scope 4. Apparatus and Materials
1.1 This test method covers the determination of the poros- 4.1 Film Applicator, 150 mm (6 in.) wide with a clearance
ity of a white or near white mineral spirits insoluble paint film of 300 µm (12 mils).
to indicate the degree to which a subsequent coat will pen-
4.2 Film Applicator, 140 mm (5 ⁄2 in.) wide with a clearance
etrate.
of 250 µm (10 mils).
1.2 The texture of the film can affect cleanup that will
4.3 Reflectometer, meeting the requirements of Test Method
influence the results of the test.Astain applied to a high-hiding
E1347.
paint will not lower the reflectance as much as the same stain
4.4 Vacuum Drawdown Plate.
applied to a low-hiding paint of equal porosity. These points
must be considered in comparing different paints.
4.5 Camelhair Brush (approximately 13 mm ( ⁄2 in.) wide).
1.3 The values stated in SI units are to be regarded as the 4.6 Plastic Wash Bottle, containing odorless mineral spirits
standard. The values given in parentheses are for information
(about 500 mL (16 oz)).
only.
4.7 Test Panel—Smooth nonporous panel such as sealed
1.4 This standard does not purport to address all of the
white, cardboard chart, or white plastic sheet.
safety concerns, if any, associated with its use. It is the
4.8 Penetrating Medium—A composition of pigment and
responsibility of the user of this standard to establish appro-
dark-colored dye dispersed in organic liquid vehicle.
priate safety and health practices and determine the applica-
4.9 Filter Paper.
bility of regulatory limitations prior to use.
2. Referenced Documents
5. Procedure
2.1 ASTM Standards:
5.1 Place the test panel on the vacuum plate and apply the
E1347 Test Method for Color and Color-Difference Mea-
paint under test with the 30-µm (12-mil) clearance drawdown
surement by Tristimulus Colorimetry
blade. Remove the test panel from the vacuum plate and air dry
48 h under standard conditions of 23 6 2°C (73 6 3.5°F) and
3. Summary of Test Method
50 6 5 % relative humidity.
3.1 The test paint is applied to a nonporous surface, air
5.2 Determine the percent reflectance of the dry film using
dried, then measured for reflectance. A special colored pen-
the green filter on the reflectometer.When making this reading,
etrating medium is applied, the excess removed in a specified
back up the panel with a flat rigid opaque object and mark the
manner, and reflectance measured again. The difference be-
area on which the reading was made.
tween the two readings indicates the degree of porosity; the
5.3 Place the panel containing the dry paint film on the
smallerthedifference,thelowertheporosityofthefilmandthe
vacuum plate. Using the 25-µm (10-mil) clearance blade, apply
greater its ability to resist penetration.
the penetrating medium over the test paint, covering the area
marked as above and drawing the applicator blade in the same
This test method is under the jurisdiction of ASTM Committee D01 on Paint
direction as before.
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.42 on Architectural Coatings.
5.4 After5min 615swashoffexcesspenetratingmedium.
CurrenteditionapprovedJune1,2010.PublishedJuly2010.Originallyapproved
To do this, hold the panel vertically and remove the mediu
...

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1.1 This test method covers a procedure for rapidly deforming by impact a coating film and its substrate and for evaluating the effect of such deformation.  
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