ASTM D7834-13(2019)

Standard Test Method for Filling Material Shedding of Paint Brushes

SIGNIFICANCE AND USE
3.1 During the application of coatings, paint brushes can exhibit shedding of filling material onto the coated surface. A measure of this shedding filling material will determine the paint brush’s ability to resist shedding during application.
SCOPE
1.1 This test method describes the procedure for testing the shedding properties of both natural bristle and synthetic filament paint brushes (referred as filling material).  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Sep-2019
• 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 D7834-13 - Standard Test Method for Filling Material Shedding of Paint Brushes
• Effective Date: 01-Oct-2019
• Referred By: ASTM D7801-17 - Standard Terminology for Paint Brush Application Tools
• Effective Date: 01-Oct-2019

Overview

ASTM D7834-13(2019), Standard Test Method for Filling Material Shedding of Paint Brushes, provides a reliable and consistent procedure for evaluating the shedding characteristics of paint brushes. This standard applies to both natural bristle and synthetic filament paint brushes and assesses how well a brush resists the loss of filling material during use. Proper measurement of shedding is important because excess bristle or filament loss can affect coating quality, causing unsightly debris on painted surfaces and compromising finish standards.

Key Topics

• Test Procedure: The method details a precise, step-by-step process using a standard large brush-making comb and white paper to quantify the amount of filling material shed. The repeatable test cycle helps ensure results are consistent and actionable across different brush types.
• Brush Types Covered: Applicable to both natural bristle and synthetic filament brushes.
• Measurement and Reporting: The method measures and records the number of filaments or bristles shed, focusing on those greater than 0.5 in. (12.7 mm). Smaller pieces can be estimated and noted for comprehensive reporting.
• Unit Standards: Values are stated in inch-pound units as the standard, with SI conversions provided for information only.
• Safety and Compliance: Users of the method must establish appropriate health, safety, and environmental practices, as the standard does not address all safety concerns or regulatory compliance.

Applications

ASTM D7834-13(2019) is widely used throughout the paint tool manufacturing and quality assurance sectors. Its main applications include:

• Product Development and Quality Control: Manufacturers employ this standard to develop new paint brush designs with reduced shedding and to maintain product consistency across production batches.
• Performance Benchmarking: Enables manufacturers and end-users to benchmark brush performance against industry standards, supporting claims related to shedding resistance.
• Supply Chain Specifications: Purchase contracts and specifications for high-quality paint brushes often reference ASTM D7834-13(2019) to ensure compliance and customer satisfaction.
• Regulatory and Trade Compliance: Developed in line with international standardization principles recognized by the World Trade Organization Technical Barriers to Trade (TBT) Committee, making it suitable for global trade and industry adoption.
• End-User Guidance: Provides retailers, contractors, and consumers with confidence that selected paint brushes meet defined shedding resistance criteria, reducing rework and improving finish quality.

Related Standards

Consider the following related standards for a comprehensive approach to paint applicator performance:

• ASTM D5023 - Standard Test Method for Measuring Shedding of Brush Filaments, Bristles or Hairs
• ASTM D5353 - Standard Specification for Artist’s Bristle Paintbrushes
• ISO 8780 - Testing of paintbrushes for physical characteristics

By integrating ASTM D7834-13(2019) with these complementary standards, organizations can ensure robust testing protocols and guarantee high-quality outcomes in professional and consumer painting applications.

Keywords: paint brush shedding, brush bristle loss, ASTM paint brush standard, paint applicator testing, quality control, brush filament testing, coating application tools.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7834 − 13 (Reapproved 2019)
Standard Test Method for
Filling Material Shedding of Paint Brushes
This standard is issued under the fixed designation D7834; 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 spacing; tooth diameter approximately .048 in. (1.2 mm); 4.75
in. (120.7 mm) comb length-out from handle.
1.1 This test method describes the procedure for testing the
4.2 Standard White Paper, 8.5 by 11 in. (215.9 by 279.4
shedding properties of both natural bristle and synthetic
filament paint brushes (referred as filling material). mm).
1.2 The values stated in inch-pound units are to be regarded
5. Sampling, Test Specimens, and Test Units
as standard. The values given in parentheses are mathematical
5.1 Sample three identical brushes per test.
conversions to SI units that are provided for information only
and are not considered standard. 6. Procedure
1.3 This standard does not purport to address all of the 6.1 Hold the brush test specimen over the white paper with
safety concerns, if any, associated with its use. It is the the filling material facing downward toward the paper at about
responsibility of the user of this standard to establish appro- a 45° angle and at a distance of 5 to 6 in. (127 to 152.4 mm)
priate safety, health, and environmental practices and deter- above the paper.
mine the applicability of regulatory limitations prior to use.
6.2 Check that the entire filling material is over the paper
1.4 This international standard was developed in accor-
surface.
dance with internationally recognized principles on standard-
6.3 Insert the teeth of the comb as deep as possible, at
ization established in the Decision on Principles for the
approximately one third of the filling material length clear from
Development of International Standards, Guides and Recom-
ferrule edge.
mendations issued by the World Trade Organization Technical
6.4 Push the comb through the filling material until the teeth
Barriers to Trade (TBT) Committee.
exit the tip of brush at about one stroke per second.
2. Summary of Test Method
6.5 Repeat steps 6.3 and 6.4 ten (10) times on each width
side of the brush.
2.1 The amount of filling material removed in this test
method is calculated to determine the shedding characteristic
6.6 Pull out any visible filling material that are protruding
of the test sample.
from the brush tip by hand and place on the paper.
6.7 Continue to follow steps 6.3 and 6.4 five (5) times on
3. Significance and Use
each thickness side of the brush.
3.1 During the application of coatings, paint brushes can
6.8 Pull out any visible filling material that are protruding
exhibit shedding of filling material onto the coated surface. A
from the brush tip by hand and place o
...