ASTM D5301-92(2012)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D5301 − 92 (Reapproved 2012)
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 several cross sections, thicknesses and lengths. The following
procedures will be helpful in identifying brush composition.
1.1 This practice covers the dimensions, terminology, ma-
terials and characteristics generally considered of importance
4. Determination of Head Dimensions
to those within, or dealing with paint brushes, and describes
4.1 Width—Determine the width by measuring the brushing
methods of determining these parameters. This practice is not
materialadjacenttotheferruleinthewideorbroaddimension,
meant to be a definitive analytical method to deformulate
usinganyaccuratelinearmeasuringdevice.Reportdimensions
brushes.
to the nearest 3 mm ( ⁄8 in.).
1.2 The values stated in SI units are to be regarded as the
4.2 Thickness—Determine the thickness by measuring the
standard. The values given in parentheses are for information
brushing material adjacent to the ferrule, in the narrow
only.
dimension, using any accurate linear measuring device. Report
1.3 This standard does not purport to address all of the
dimensions to the nearest 1 mm ( ⁄16 in.).
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 4.3 Length Clear (Length Out)—Determine the length by
priate safety and health practices and determine the applica- measuring the exposed filament or bristle length from the edge
bility of regulatory limitations prior to use. 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.
Report dimensions to the nearest 1 mm ( ⁄16 in.).
2.1 Definitions:
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.
5. Brush Tip Configuration
2.1.2 flat tip, n—a description of the configuration of the tip
5.1 Describe the configuration at the tip of the head as
of the brush as being flat or of uniform length across the
chiseled or flat (see 2.1.1 and 2.1.2).
thickness dimension.
2.1.3 flagged, n—a term describing the tip of a filament or
6. Brushing Material Characteristics
bristleasbeingsplitresultinginamultiplicityoffilamentends.
6.1 Cross-Sectional Shape—Determine the cross-sectional
2.1.4 tipped, n—a term describing the tip of a filament or
shape of the filaments or bristles by inserting a representative
bristle as coming to a point.
sample of brushing material into the slot of a microtome,
2.1.5 microtome, n—a device for holding a number of
cutting the material flush with the surface of the microtome
filament or bristle materials in a rigid state for a cross sectional
with a razor blade, and examining it visually with a 30× or
examination under a microscope (see Fig. 1).
greater microscope. Report the observations of filament shapes
for example, round, solid, hollow or others.
3. Significance and Use
6.2 Filament or Bristle Length—Determine the lengths of
3.1 Itisimportanttorecognizethatabrushcanbeamixture
the filaments or bristles used in a brush by opening the ferrule
of several chemically different filaments or bristles, or both, in
and removing the filaments from that portion of the brush
unaffected by the chisel. Measure a representative number of
specimens to the nearest 1 mm ( ⁄16 in.), and report the length
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
or various lengths.
Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.61 on Paint Application Tools.
6.3 Filament or Bristle Thickness and Profile—Remove a
Current edition approved Nov. 1, 2012. Published November 2012. Originally
representative sample of filaments or bristles (10 to 20) from
approved in 1992. Last previous edition approved in 2008 as D5301 – 92 (2008).
DOI: 10.1520/D5301-92R12. the brush as described in 6.2 and measure their thickness or
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