ASTM D3258-04(2014)
(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
Relations
Buy Standard
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation: D3258 − 04 (Reapproved 2014)
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.
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.
5. Procedure
2. Referenced Documents
2 5.1 Place the test panel on the vacuum plate and apply the
2.1 ASTM Standards:
paint under test with the 30-µm (12-mil) clearance drawdown
E1347 Test Method for Color and Color-Difference Mea-
blade. Remove the test panel from the vacuum plate and air dry
surement by Tristimulus Colorimetry
48 h under standard conditions of 23 6 2°C (73 6 3.5°F) and
50 6 5 % relative humidity.
3. Summary of Test Method
5.2 Determine the percent reflectance of the dry film using
3.1 The test paint is applied to a nonporous surface, air
the green filter on the reflectometer.When making this reading,
dried, then measured for reflectance. A special colored pen-
back up the panel with a flat rigid opaque object and mark the
etrating medium is applied, the excess removed in a specified
area on which the reading was made.
manner, and reflectance measured again. The difference be-
5.3 Place the panel containing the dry paint film on the
tween the two readings indicates the degree of porosity; the
smallerthedifference,thelowertheporosityofthefilmandthe vacuum plate. Using the 25-µm (10-mil) clearance blade, apply
the penetrating medium over the test paint, covering the area
greater its ability to resist penetration.
marked as above and drawing the applicator blade in the same
direction as before.
This test method is under the jurisdiction of ASTM Committee D01 on Paint
5.4 After 5 min 6 15 s wash off excess penetrating medium.
and Related Coatings, Materials, andApplications and is the direct responsibility of
To do this, hold the panel vertically and remove the medium
Subcommittee D01.42 on Architectural Coatings.
using the camelhair brush wet with odorless mineral spirits.
Current edition approved Dec. 1, 2014. Published December 2014. Originally
ε1
Repeat the process until m
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: D3258 − 04 (Reapproved 2010) D3258 − 04 (Reapproved 2014)
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.
ε NOTE—Section 2 and 4.3 – Test Method E97 was withdrawn and replaced by Test Method E1347 in June 2010.
1. 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.
2. Referenced Documents
2.1 ASTM Standards:
E1347 Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry
3. Summary of Test Method
3.1 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.
4. Apparatus and Materials
4.1 Film Applicator, 150 mm (6 in.) wide with a clearance of 300 μm (12 mils).
4.2 Film Applicator, 140 mm (5 ⁄2 in.) wide with a clearance of 250 μm (10 mils).
4.3 Reflectometer, meeting the requirements of Test Method E1347.
4.4 Vacuum Drawdown Plate.
4.5 Camelhair Brush (approximately 13 mm ( ⁄2 in.) wide).
4.6 Plastic Wash Bottle, containing odorless mineral spirits (about 500 mL (16 oz)).
4.7 Test Panel—Smooth nonporous panel such as sealed white, cardboard chart, or white plastic sheet.
4.8 Penetrating Medium—A composition of pigment and dark-colored dye dispersed in organic liquid vehicle.
4.9 Filter Paper.
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 June 1, 2010Dec. 1, 2014. Published July 2010December 2014. Originally approved in 1973. Last previous edition approved in 20042010 as
ε1
D3258 – 04.D3258 – 04 (2010) . DOI: 10.1520/D3258-04R10E01.10.1520/D3258-04R10R14.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’sstandard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D3258 − 04 (2014)
5. Procedure
5.1 Place the test panel on the vacuum plate and apply the paint under test with the 30-μm (12-mil) clearance drawdown blade.
Remove the test panel from the vacuum plate and air dry 48 h under standard conditions
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.