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ASTM D4941-06

(Practice)

Standard Practice for Preparing Drawdowns of Artists' Paste Paints

Standard Practice for Preparing Drawdowns of Artists' Paste Paints

SCOPE
1.1 This practice covers the production of uniform films of artists' tube paints and other nonflowing pigmented paints using paint applicators designed for less viscous paints.
1.2 Information on how to achieve opaque specimens from these paints is included.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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-Mar-2006
ICS
87.060.30 - Solvents
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.57 - Artist Paints and Related Materials
Current Stage
Ref Project

Relations

Replaces
ASTM D4941-89(2004) - Standard Practice for Preparing Drawdowns of Artists' Paste Paints
Effective Date
01-Apr-2006
Replaced By
ASTM D4941-06(2010) - Standard Practice for Preparing Drawdowns of Artists' Paste Paints
Effective Date
01-Dec-2010
Referred By
ASTM D4302-14(2021) - Standard Specification for Artists’ Oil, Resin-Oil, and Alkyd Paints
Effective Date
01-Apr-2006
Referred By
ASTM D5098-16(2021) - Standard Specification for Artists' Acrylic Dispersion Paints
Effective Date
01-Apr-2006

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ASTM D4941-06 - Standard Practice for Preparing Drawdowns of Artists' Paste PaintsASTM D4941-06 - Standard Practice for Preparing Drawdowns of Artists' Paste Paints
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ASTM D4941-06 - Standard Practice for Preparing Drawdowns of Artists' Paste Paints
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D4941–06
Standard Practice for
1
Preparing Drawdowns of Artists’ Paste Paints
This standard is issued under the fixed designation D4941; 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. Summary of Practice
1.1 This practice covers the production of uniform films of 4.1 The paint is spread over the area of the test panel to be
artists’ tube paints and other nonflowing pigmented paints covered by the drawdown and the bar is pulled down with
using paint applicators designed for less viscous paints. pressure just sufficient to avoid lifting of the bar from the chart
1.2 Information on how to achieve opaque specimens from surface.
these paints is included. 4.2 Test panels are allowed to dry in a dust-free environ-
1.3 The values stated in SI units are to be regarded as the ment.
standard. The values given in parentheses are for information 4.3 If complete hiding (opacity) is needed and not produced
only. by a single paint film, a second film is applied at a 90° angle to
1.4 This standard does not purport to address all of the the first. If required, additional layers may be applied using a
safety concerns, if any, associated with its use. It is the narrower drawdown bar.
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 5.1 Quality standards for artists’ paints require the evalua-
tion of various appearance characteristics of paint films.
2. Referenced Documents
Tinting strength determination (Test Method D4838) specifi-
2
2.1 ASTM Standards: cally requires the preparation of drawdowns for colorimetric
D16 Terminology for Paint, Related Coatings, Materials, measurement. Other evaluations such as color designation,
and Applications transparency, gloss, and color difference measurements also
D4838 Test Method for Determining the Relative Tinting require drawdown samples.
Strength of Chromatic Paints 5.2 Artists’ tube paints have a paste consistency that makes
E1164 Practice for Obtaining Spectrometric Data for the use of traditional film application methods difficult, espe-
Object-Color Evaluation cially for drying oil paints.
5.3 Artists’ paints vary in two properties important to the
3. Terminology
preparation of films, that is, transparency and drying time.
3.1 Definitions—See Terminology D16 for definitions of
Colorimetric determination and some other types of evaluation
terms used in this practice. require paint specimens that completely hide the substrate.
3.2 Definitions of Terms Specific to This Standard:
Very transparent paints require such a thick film to produce
3.2.1 drawdown, n—a layer of paint deposited on a sub- complete hiding that drying times is excessively long or the
strate by use of a drawdown bar for the evaluation of paint
specimen surface is blemished. When complete hiding is
characteristics.
necessary, this practice is designed to provide opaque films
3.2.2 drawdown bar, n—a metal applicator with a specified without these defects through application of a series of thin
gap designed to deposit a wet paint film uniformly on a
films.
specified test panel (for example, an opacity chart) or other
6. Apparatus
substrate.
6.1 Drawdown Bars, two, of different widths with a clear-
ance of 0.152 mm (0.006 in.). Recommended widths are 7.6
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
cm (3 in.) and 15.2 cm (6 in.). The second bar is required to
Related Coatings, Materials, and Applications and is the direct responsibility of
prepare drawdowns with more than two layers. Wire wound
Subcommittee D01.57 on Artists’ Paints and Related Materials.
Current edition approved April 1, 2006. Published April 2006. Originally
drawdown bars have been found to be unsuitable.
approved in 1989. Last previous edition approved in 2004 as D4941 – 89 (2004).
6.2 Drawdown Charts, sealed paper type, half black and
DOI: 10.1520/D4941-06.
2
half white if transparency is being evaluated or opacity is
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 necessary.
Standards volume information, refer to the standard’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.
1

---------------------- Page: 1 ----------------------
D4941–06
7. Procedure
7.1 Attach chart to a firm, smooth, level plane surface using
tape, a vacuum plate, or a clamp. L
...

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1.1 This test method is for the determination of acetone, methyl acetate, or parachlorobenzotrifluoride (PCBTF), or combination of any of the three, in paints and coatings, by solid phase microextraction (SPME) headspace sampling, and subsequent injection into a gas chromatograph. It has been evaluated for cellulose nitrate, acrylic, and urethane solvent-borne systems. The established working range of this test method is: acetone, 28 to 90 %; methyl acetate, 12 to 22 %; parachlorobenzotrifluoride, 10 to 17 %. There is no reason to believe that it will not work outside these ranges. A minor modification of this test method would make it suitable for the analysis of the same analytes in water-borne coatings (see Note 1).
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