ASTM D5301-92(2024)

Standard Practice for Physical Characterization of Paint Brushes

SIGNIFICANCE AND USE
3.1 It is important to recognize that a brush can be a mixture of several chemically different filaments or bristles, or both, in several cross sections, thicknesses and lengths. The following procedures will be helpful in identifying brush composition.
SCOPE
1.1 This practice covers the dimensions, terminology, materials and characteristics generally considered of importance to those within, or dealing with paint brushes, and describes methods of determining these parameters. This practice is not meant to be a definitive analytical method to deformulate brushes.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
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: 31-Jan-2024
• 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 D5301-92(2016) - Standard Practice for Physical Characterization of Paint Brushes
• Effective Date: 01-Feb-2024
• Referred By: ASTM D5913-96(2019) - Standard Test Method for Evaluation of Cleanability of Paint Brushes
• Effective Date: 01-Feb-2024
• Referred By: ASTM D5068-04(2019) - Standard Practice for Preparation of Paint Brushes for Evaluation
• Effective Date: 01-Feb-2024
• Referred By: ASTM D7073-20 - Standard Guide for Application and Evaluation of Brush and Roller Applied Paint Films
• Effective Date: 01-Feb-2024
• Referred By: ASTM D7801-17 - Standard Terminology for Paint Brush Application Tools
• Effective Date: 01-Feb-2024
• Referred By: ASTM D7488-11(2024) - Standard Test Method for Open Time of Latex Paints
• Effective Date: 01-Feb-2024

Overview

ASTM D5301-92(2024): Standard Practice for Physical Characterization of Paint Brushes provides practical methods for evaluating and describing the physical properties of paint brushes. Developed by ASTM International, this standard supports manufacturers, suppliers, and quality control professionals in specifying, sourcing, and inspecting paint brushes to ensure consistent performance and suitability for various painting applications.

By outlining clear procedures for measuring dimensions, identifying materials, and describing key brush characteristics, ASTM D5301 helps facilitate communication and product comparison within the coatings and painting industries.

Key Topics

• Brush Dimensions: Methods to accurately measure brush width, thickness, and length (clear length out) adjacent to the ferrule using linear measuring devices.
• Tip Configurations: Terminology and identification of brush tip types, such as chiseled, flat, flagged (split ends), or tipped (pointed).
• Brushing Material Characteristics: Examination and reporting of filament or bristle cross-sectional shape, length, thickness, profile (level or tapered), and color.
• Ferrule Attributes: Procedures for determining ferrule dimensions, materials (e.g., tin-plated steel, nickel-plated steel, brass), finish (lacquered or not), and shape of the ferrule opening.
• Handle Features: Measurement and description of handle length, material (wood, plastic, etc.), finish (sealed, lacquered), style (beavertail, flat sash, kaiser, pencil), and attachment methods (stapled, nailed, crimped).
• Chemical Composition: Approaches to identify filament or bristle composition, including traditional analytical techniques like burning odor, solubility, density, melting point, and infrared spectroscopy.
• Finishing Processes: Visual examination of filament tips for characteristics such as tipping or flagging to determine processing quality.

Applications

ASTM D5301-92(2024) is widely used in the following scenarios:

• Quality Control and Assurance: Paint brush manufacturers utilize the standard for routine inspection and verification of production consistency.
• Product Specification and Sourcing: Procurement professionals and specifiers reference this practice to communicate requirements clearly to suppliers or compare products from multiple vendors.
• Laboratory and Field Testing: Labs engaged in the evaluation of paint application tools apply these procedures when characterizing samples for performance testing or material study.
• Regulatory Compliance and Reporting: Companies required to provide detailed technical documentation or compliance reports for procurement, trade, or regulatory purposes benefit from the standardized terminology and measurement methods.
• R&D and Competitive Analysis: Research and development teams employ the standard when designing new paint brush products or benchmarking against industry offerings.

Related Standards

For comprehensive paint brush evaluation and quality assurance, consider referencing these related ASTM and international standards:

• ASTM D5067: Standard Practice for Brush Application of Paints
• ASTM D2486: Standard Test Methods for Scrub Resistance of Wall Paints
• ISO 5426: Paintbrushes - Terminology
• ASTM D344: Standard Test Method for Relative Hiding Power of Paints by the Visual Evaluation of Brushouts

By integrating ASTM D5301 with these standards, organizations can establish robust protocols for paint brush testing, characterization, and product development across global markets.

Keywords: ASTM D5301, physical characterization, paint brushes, brush dimensions, filament analysis, ferrule, handle styles, quality control, paint application tools, standards compliance

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: D5301 − 92 (Reapproved 2024)
Standard Practice for
Physical Characterization of Paint Brushes
This standard is issued under the fixed designation D5301; 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 2.1.5 microtome, n—a device for holding a number of
filament or bristle materials in a rigid state for a cross sectional
1.1 This practice covers the dimensions, terminology, ma-
examination under a microscope (see Fig. 1).
terials and characteristics generally considered of importance
to those within, or dealing with paint brushes, and describes
3. Significance and Use
methods of determining these parameters. This practice is not
3.1 It is important to recognize that a brush can be a mixture
meant to be a definitive analytical method to deformulate
of several chemically different filaments or bristles, or both, in
brushes.
several cross sections, thicknesses and lengths. The following
1.2 The values stated in SI units are to be regarded as the
procedures will be helpful in identifying brush composition.
standard. The values given in parentheses are for information
only.
4. Determination of Head Dimensions
1.3 This standard does not purport to address all of the
4.1 Width—Determine the width by measuring the brushing
safety concerns, if any, associated with its use. It is the
material adjacent to the ferrule in the wide or broad dimension,
responsibility of the user of this standard to establish appro-
using any accurate linear measuring device. Report dimensions
priate safety, health, and environmental practices and deter- 1
to the nearest 3 mm ( ⁄8 in.).
mine the applicability of regulatory limitations prior to use.
4.2 Thickness—Determine the thickness by measuring the
1.4 This international standard was developed in accor-
brushing material adjacent to the ferrule, in the narrow
dance with internationally recognized principles on standard-
dimension, using any accurate linear measuring device. Report
ization established in the Decision on Principles for the
dimensions to the nearest 1 mm ( ⁄16 in.).
Development of International Standards, Guides and Recom-
4.3 Length Clear (Length Out)—Determine the length by
mendations issued by the World Trade Organization Technical
measuring the exposed filament or bristle length from the edge
Barriers to Trade (TBT) Committee.
of the ferrule to its tip, using any accurate linear measuring
device. Measure the brush on each end of the width and
2. Terminology
average the measurements so obtained to give the mean value.
2.1 Definitions:
Report dimensions to the nearest 1 mm ( ⁄16 in.).
2.1.1 chisel (or chiseled), n—a description of the configu-
NOTE 1—In the case of an angular sash brush, indicate whether the
ration of the tip of the brush as being of a more or less convex
ferrule is angular or straight.
shape across the thickness dimension.
2.1.2 flat tip, n—a description of the configuration of the tip
5. Brush Tip Configuration
of the brush as being flat or of uniform length across the
5.1 Describe the configuration at the tip of the head as
thickness dimension.
chiseled or flat (see 2.1.1 and 2.1.2).
2.1.3 flagged, n—a term describing the tip of a filament or
bristle as being split resulting in a multiplicity of filament ends. 6. Brushing Material Characteristics
6.1 Cross-Sectional Shape—Determine the cross-sectional
2.1.4 tipped, n—a term describing the tip of a filament or
bristle as coming to a point. shape of the filaments or bristles by inserting a representative
sample of brushing material into the slot of a microtome,
cutting the material flush with the surface of the microtome
with a razor blade, and examining it visually with a 30× or
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
greater microscope. Report the observations of filament shapes
Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.61 on Paint Application Tools. for example, round, solid, hollow or others.
Current edition approved Feb. 1, 2024. Published February 2024. Originally
6.2 Filament or Bristle Length—Determine the lengths of
approved in 1992. Last previous edition approved in 2016 as D5301 – 92 (2016).
DOI: 10.1520/D5301-92R24. the filaments or bristles used in a brush by opening the ferrule
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D5301 − 92 (2024)
7. Ferrule Characteristics
7.1
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