ASTM D5068-04

Standard Practice for Preparation of Paint Brushes for Evaluation

SIGNIFICANCE AND USE
Until the paint brush is fully conditioned and wetted with paint, only part of the paint loaded onto the brush can be transferred to the surface being painted. By properly preparing the brush before use, the amount of paint delivered to the surface can be made more uniform and reflect real use.
SCOPE
1.1 This practice describes the preparation of paint brushes for evaluation.
1.2 This practice is applicable to paint brushes 50 to 100 mm (2 to 4 in.) in width.
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 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-2004
• ICS: 87.100 - Paint coating equipment
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.61 - Paint Application Tools

Relations

• Replaces: ASTM D5068-02 - Standard Practice for Preparation of Paint Brushes for Evaluation
• Effective Date: 01-Jun-2004
• Replaced By: ASTM D5068-04(2009) - Standard Practice for Preparation of Paint Brushes for Evaluation
• Effective Date: 01-Jun-2009
• Referred By: ASTM D5324-16(2022) - Standard Guide for Testing Water-Borne Architectural Coatings
• Effective Date: 01-Jun-2004
• Referred By: ASTM D7072-04(2019) - Standard Practice for Evaluating Accelerated Efflorescence of Latex Coatings
• Effective Date: 01-Jun-2004
• Referred By: ASTM D4958-10(2016) - Standard Test Method for Comparison of the Brush Drag of Latex Paints
• Effective Date: 01-Jun-2004
• Referred By: ASTM D5913-96(2019) - Standard Test Method for Evaluation of Cleanability of Paint Brushes
• Effective Date: 01-Jun-2004
• Referred By: ASTM D6686-01(2019) - Standard Test Method for Evaluation of Tannin Stain Resistance of Coatings
• Effective Date: 01-Jun-2004
• Referred By: ASTM D7801-17 - Standard Terminology for Paint Brush Application Tools
• Effective Date: 01-Jun-2004
• Referred By: ASTM D7073-20 - Standard Guide for Application and Evaluation of Brush and Roller Applied Paint Films
• Effective Date: 01-Jun-2004
• Referred By: ASTM D5146-10(2019) - Standard Guide to Testing Solvent-Borne Architectural Coatings
• Effective Date: 01-Jun-2004
• Referred By: ASTM D7489-09(2017) - Standard Practice for Evaluating Touch-Up Properties of Architectural Coatings under Various Environmental Conditions
• Effective Date: 01-Jun-2004
• Referred By: ASTM D7488-11(2016) - Standard Test Method for Open Time of Latex Paints
• Effective Date: 01-Jun-2004

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:D5068–04
Standard Practice for
1
Preparation of Paint Brushes for Evaluation
This standard is issued under the fixed designation D5068; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 5. Apparatus
1.1 This practice describes the preparation of paint brushes 5.1 Container, to hold paint, for example, a quart can.
for evaluation. 5.2 Test Brush, 50 to 100 mm (2 to 4 in.) in width.
1.2 This practice is applicable to paint brushes 50 to 100 5.3 Balance, to weigh brush to the nearest 0.1 gram.
mm (2 to 4 in.) in width.
6. Materials
1.3 The values stated in SI units are to be regarded as the
6.1 Test Paint.
standard. The values given in parentheses are for information
3
only. 6.2 Brush-Out Panels, or other typical panels to be used.
6.3 Masking Tape, to secure the panel to a flat surface.
1.4 This standard does not purport to address the safety
concerns, if any, associated with its use. It is the responsibility
7. Procedure
of the user of this standard to establish appropriate safety and
7.1 All tests are to be conducted in an atmosphere having a
health practices and determine the applicability of regulatory
temperature of 23 6 2°C (73.5 6 3.5°F) and a relative
limitations prior to use.
humidity of 50 6 5% (see Specification D3924).
2. Referenced Documents
7.2 Record weight of the test brush before loading (W1)
2
using the example format as a guide (seeTable 1). Place brush
2.1 ASTM Standards:
D3924 Specification for Standard Environment for Condi- out panel on scale and tare.
7.3 Dip the brush into the specified paint to one-half the
tioning and Testing Paint, Varnish, Lacquer, and Related
Materials length of the filament.
D5301 Practice for Physical Characterization of Paint
NOTE 1—It is very important to assure that the depth that the brush
Brushes
filamentsaredippedintothepaintisconsistentfrombrushouttobrushout.
Toaidindeterminingthedepthtodipthefilaments,atonguedepressoror
3. Summary of Practice
other guide for the specified length can be taped to the brush ferrule.
3.1 Using a paint chosen for the evaluation, the brush to be
7.4 Hold the brush at the specified depth in the paint for
tested is repeatedly loaded with paint and brushed over a
10 s. Remove and hold the brush vertically for 30 s allowing
specified area in a specified application time.
any excess paint to drain back into the paint can.
7.5 Secure the brush-out panel with masking tape to a flat,
4. Significance and Use
smooth, horizontal surface.
4.1 Until the paint brush is fully conditioned and wetted
7.6 After the drain period, immediately place brush on a
with paint, only part of the paint loaded onto the brush can be
tared brush-out panel and weigh. Record the brush weight
transferred to the surface being painted. By properly preparing
loaded with paint (W2). Record the amount of paint picked up
the brush before use, the amount of paint delivered to the
by the brush as A, where A = W2−W1. Apply paint to the
surface can be made more uniform and reflect real use.
specifiedinitialareaonthebrush-outpanelasindicatedbelow:
2
Brush Width, mm (in.) Initial Area, (cm )
1
50 and 62.5 (2 and 2 ⁄2) 250
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
75 and 100 (3 and 4) 500
Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.61 on Paint Application Tools.
CurrenteditionapprovedJune1,2004.PublishedJuly2004.Originallyapproved
in 1990. Last previous edition approved in 2002 as D5068–02.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Any smooth type panel can be used. A Leneta 8H-BW Chart, available from
Standards volume information, refer to the standard’s Document Summary page on TheLenetaCo.,15WhitneyRoad,Mahaw,N.J.07430hasbeenusedinroundrobin
the ASTM website. testing for this purpose.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D5068–04
TABLE 1 Example Calculation
Initial Break-In Break-In Break-In Break-In Break-In
Break-In 1 2 3 4 5
Brush Weight before Loading, grams W1 65.5 73.1 75.4
Brush Weight Loaded w/Paint W2 74.7 77.4 79.0
Net Paint Weight Pick Up A 9.3 4.3 3.6
Brush Weight after Painting W3 73.1 75.4 77.2
Net Paint Discharged B 1.6 2.0 1.8
Cum Paint Weight Pick Up C 9.3 11.9 13.5
Difference in Pick Up D 9.3 2.7 1.6
% Additional Pick Up versus Time P 100.0 22.4 11.8
7.7 Application time shall be 15 s for 50 to 62.5-mm (2 to d
...