Standard Test Method for Evaluation of Color for Thermoplastic Traffic Marking Materials

SCOPE
1.1 This test method covers the instrumental determination of color of thermoplastic traffic marking materials in the CIE 1931 system.
1.2 The values stated in inch-pound 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 and health practices and determine the applicability of regulatory limitations prior to use.

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Publication Date
09-Oct-1998
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ASTM D4960-89(1998) - Standard Test Method for Evaluation of Color for Thermoplastic Traffic Marking Materials
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
Designation: D 4960 – 89 (Reapproved 1998)
Standard Test Method for
Evaluation of Color for Thermoplastic Traffic Marking
Materials
This standard is issued under the fixed designation D 4960; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.2.1 thermochromism—a color hue change that takes place
in the thermoplastic material due to temperature changes.
1.1 This test method covers the instrumental determination
3.2.2 thermoplastic traffıc marking material—ahighlyfilled
of color of thermoplastic traffic marking materials in the CIE
100 % total solids highway marking material that when heated
1931 system.
toamoltenstatecanbeextrudedorsprayedontoaroadsurface
1.2 The values stated in inch-pound units are to be regarded
and when cooled forms a solid, durable delineator.
as the standard. The values given in parentheses are for
information only.
4. Summary of Test Method
1.3 This standard does not purport to address all of the
4.1 The thermoplastic specimen is prepared for this test by
safety concerns, if any, associated with its use. It is the
melting a sample to its application temperature under continu-
responsibility of the user of this standard to establish appro-
ous agitation and then pouring it into a TFE-fluorocarbon
priate safety and health practices and determine the applica-
coated pan, to form a patty of approximately 3 in. (7.6 cm) in
bility of regulatory limitations prior to use.
diameter. The patty is allowed to cool to room temperature
2. Referenced Documents before measuring the color. Color measurements are made on
the flat side or the top side of the thermoplastic patty.
2.1 ASTM Standards:
D 883 Terminology Relating to Plastics
NOTE 1—No significant color differences are encountered in reading
E97 Test Method for Directional Reflectance Factor, 45-
the top or bottom of the patty.
deg, 0-deg, of Opaque Specimens by Broad-Band Filter
5. Significance and Use
Reflectometry
E 179 Guide for Selection of Geometric Conditions for 5.1 This test method provides a standard procedure for the
determination of color of thermoplastic traffic marking mate-
Measurement of Reflectance and Transmission Properties
of Materials rials. This test method can be used in conjunction with
specifications to determine the uniformity of thermoplastic
E 284 Terminology of Appearance
E 308 Practice for Computing the Colors of Objects by traffic marking materials from batch to batch and that produced
by various suppliers.
Using the CIE System
E 1164 Practice for Obtaining Spectrophotometric Data for 5.2 There is a slight variation in color standards and
colorimeters. This test method is only applicable when results
Object-Color Evaluation
F 412 Terminology Relating to Plastic Piping Systems are reported with the instrument model designation and white
color calibration standard identification information.
3. Terminology
6. Apparatus
3.1 Definitions—Definitions are in accordance with Termi-
6.1 Agitator Blade, 6 in. (15 cm) long with a ⁄2-in. (1-cm)
nology D 883, E 284 and F 412, unless otherwise indicated.
3 1
3.2 Definitions of Terms Specific to This Standard: steel shaft and a 1 ⁄4by1by ⁄8-in. (4.5 by 2.5 by 0.3-cm)
straight horizontal steel blade.
6.2 Drill Press, or other apparatus capable of agitating the
This test method is under the jurisdiction of ASTM Committee D-1 on Paint
thermoplastic marking material in the electric pots at 600 to
and Related Coatings, Materials, andApplications and is the direct responsibility of
700 r/min during meltdown to the application temperature.
Subcommittee D01.44 on Traffic Coatings.
6.3 Heating Equipment:
Current edition approved Oct. 10, 1998. Published August 1989.
Annual Book of ASTM Standards, Vol 08.01.
6.3.1 Gravity Convection Oven, capable of maintaining
Discontinued, see 1991 Annual Book of ASTM Standards, Vol 06.01.
260°C, for melting the thermoplastic traffic marking.
Annual Book of ASTM Standards, Vol 06.01.
5 6.3.2 Hot Plate, capable of maintaining 537°C.
Annual Book of ASTM Standards, Vol 08.04.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
D 4960 – 89 (1998)
6.3.3 Insulated Electric Pots, for heating and melting the 8.3 Allow the patty to cool to ro
...

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