Astm D 5068 – 02 pdf free download

Standard Practice for
Preparation of Paint Brushes for Evaluation1

This standard is issued under the fixed designation D 5068; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of the last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This practice describes the preparation of paintbrushes
for evaluation.

1.2 This practice is applicable to paint brushes 2 to 4 in. (50
to 100 mm) in width.

1.3 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.

2. Referenced Documents

2.1 ASTM Standards:
D 3924 Specification for Standard Environment for Conditioning and Testing Paint, Varnish, Lacquers, and Related
D 5301 Practice for Physical Characterization of Paint

3. Summary of Practice

3.1 Using a paint chosen for the evaluation, the brush to be
tested is repeatedly loaded with this paint and brushed over a
specified area in a specified application time.

4. Significance and Use

4.1 Until the paintbrush 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
the surface can be made more uniform and reflect real use.

5. Apparatus

5.1 Container, to hold paint, for example, a quart can.

5.2 Test Brush, 2 to 4 in. (50 to 100 mm) in width.

5.3 Balance, to weigh the brush to the nearest 0.1 gram.

6. Materials

6.1 Test Paint.

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