ASTM D7834-13
(Test Method)Standard Test Method for Filling Material Shedding of Paint Brushes
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D7834 − 13
Standard Test Method for
1
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 6. Procedure
1.1 This test method describes the procedure for testing the
6.1 Hold the brush test specimen over the white paper with
shedding properties of both natural bristle and synthetic
the filling material facing downward toward the paper at about
filament paint brushes (referred as filling material).
a 45° angle and at a distance of 5 to 6 in. (127 to 152.4 mm)
1.2 The values stated in inch-pound units are to be regarded above the paper.
as standard. The values given in parentheses are mathematical
6.2 Check that the entire filling material is over the paper
conversions to SI units that are provided for information only
surface.
and are not considered standard.
6.3 Insert the teeth of the comb as deep as possible, at
1.3 This standard does not purport to address all of the
approximately one third of the filling material length clear from
safety concerns, if any, associated with its use. It is the
ferrule edge.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6.4 Push the comb through the filling material until the teeth
bility of regulatory limitations prior to use.
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
2.1 The amount of filling material removed in this test
side of the brush.
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.
3. Significance and Use
6.7 Continue to follow steps 6.3 and 6.4 five (5) times on
3.1 During the application of coatings, paint brushes can
each thickness side of the brush.
exhibit shedding of filling material onto the coated surface. A
6.8 Pull out any visible filling material that are protruding
measure of this shedding filling material will determine the
from the brush tip by hand and place on the paper.
paint brush’s ability to resist shedding during application.
6.9 Fan the tip of the brush back and forth with the comb
4. Equipment
five times along the width direction and pull out any remaining
4.1 Standard Large Brush Making Comb, typically with a
loose filling material protruding from the brush tip. The
wood handle and steel teeth (see Fig. 1). Teeth approximately
amount of depth that the tines m
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7834 − 12 D7834 − 13
Standard Test Method for
1
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
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 and health practices and determine the applicability of regulatory
limitations prior to use. Some specific hazards statements are given in Section 7 on Hazards.
2. Summary of Test Method
2.1 The amount of filling material removed in this test method is calculated to determine the shedding characteristic of the test
sample.
3. 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.
4. Equipment
4.1 Standard Large Brush Making Comb, typically with a wood handle and steel teeth (see Fig. 1). Teeth approximately .88 in.
(22.2 mm) long; teeth portion of comb approximately 36 teeth at 4.14 in. (105.1 mm), resulting in .15 in. (2.9 mm) tooth spacing;
tooth diameter approximately .048 in. (1.2 mm); 4.75 in. (120.7 mm) comb length-out from handle.
Teeth approximately .88 in. (22.2 mm) long
Teeth portion of comb approximately 36 teeth at 4.14 in. (105.1 mm), resulting in .15 in. (2.9 mm) tooth spacing
Tooth diameter approximately .048 in. (1.2 mm)
4.75 in. (120.7 mm) comb length-out from handle
4.2 Standard White Paper, 8.5 by 11 in. (215.9 by 279.4 mm).
5. Sampling, Test Specimens, and Test Units
5.1 Sample three identical brushes per test.
6. Procedure
6.1 Hold the brush test specimen over the white paper with the filling material facing downward toward the paper at about a
45° angle and at a distance of 5 to 6 in. (127 to 152.4 mm) above the paper.
6.2 Check that the entire filling material is over the paper surface.
6.3 Insert the teeth of the comb as deep as possible, at approximately one third of the filling material length clear from ferrule
edge.
6.4 Push the comb through the filling material until the teeth e
...
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