ASTM E1347-03

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Designation:E1347–03
Standard Test Method for
Color and Color-Difference Measurement by Tristimulus
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(Filter) Colorimetry
This standard is issued under the fixed designation E 1347; 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 procedures appropriate for different types of specimens and
uses, and on the spectral character (metamerism or paramer-
1.1 This test method describes the instrumental measure-
ism) of specimens and standards.
ment of specimens resulting in color coordinates and color
1.6 This standard does not purport to address all of the
differencevaluesbyusingatristimulus(filter)colorimeter,also
safety concerns, if any, associated with its use. It is the
known as a color-difference meter. This test method does not
responsibility of the user of this standard to establish appro-
apply to the use of a spectrocolorimeter, which is a spectro-
priate safety and health practices and determine the applica-
photometer that is normally capable of producing as output
bility of regulatory limitations prior to use.
colorimetric data, but not the underlying spectral data from
which color coordinates are calculated. Measurement by using
2. Referenced Documents
aspectrocolorimeteriscoveredinPracticeE 1164andmethods
2.1 ASTM Standards:
on color measurement by spectrophotometry.
D 2244 Practice for Calculation of Color Tolerances and
1.2 Provision is made in this test method for the measure-
Color Differences from Instrumentally Measured Color
ment of color coordinates and color differences by reflected
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Coordinates
light using either a hemispherical optical measuring system,
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D 4086 Practice for Visual Evaluation of Metamerism
such as an integrating sphere, or a bidirectional optical mea-
E 167 Practice for Goniophotometry of Objects and Mate-
suring system, such as annular, circumferential, or uniplanar
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rials
45/0or0/45geometry.Provisionisalsomadeformeasurement
E 179 Guide for Selection of Geometric Conditions for
by transmitted light using a hemispherical optical measuring
Measurement of Reflection and Transmission Properties of
system.
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Materials
1.3 Because of the limited absolute accuracy of tristimulus
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E 284 Terminology of Appearance
(filter) colorimeters, this test method specifies that, when color
E 805 PracticeforIdentificationofInstrumentalMethodsof
coordinates are required, the instrument be standardized by use
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Color or Color-Difference Measurement of Materials
of a standard having similar spectral (color) and geometric
E 991 Practice for Color Measurement of Fluorescent
characteristics to those of the specimen. The use of a product
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Specimens
standard of suitable stability is highly desirable.
E 1164 Practice for Obtaining Spectrophotometric Data for
1.4 Because of the inability of tristimulus (filter) colorim-
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Object-Color Evaluation
eters to detect metamerism or paramerism, or to correctly
measure metameric or parameric pairs of specimens, this test
3. Terminology
method specifies that, when color differences are required, the
3.1 Definitions:
two specimens must have similar spectral (color) and geomet-
3.1.1 The definitions in Guide E 179 and Terminology
ric characteristics. In this case, the instrument may be stan-
E 284 are applicable to this test method.
dardized for reflectance measurement by use of a white
reflectance standard or, for transmittance measurement, with
4. Summary of Test Method
no specimen or standard at the specimen position.
4.1 This test method provides procedures for measuring
1.5 While this test method is generally suitable for all
object-color specimens in either transmission or reflection with
object-color specimens, it should not be used without observ-
a tristimulus (filter) colorimeter (hereafter referred to as a
ing certain restrictions on the geometries and standardization
colorimeter) by use of the following geometric conditions and
standardization procedures:
4.1.1 Color differences by reflected light of nonmetameric,
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This test method is under the jurisdiction of ASTM Committee E12 on Color
nonparameric pairs of opaque or translucent specimens by use
and Appearance and is the direct responsibility of Subcommittee E12.02 on
Spectrophotometry and Colorimetry.
Current edition approved July 10, 2003. Published August 2003. Originally
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approved in 1990. Last previous edition approved in 1997 as E 1347 – 97. Annual Book of ASTM Standards, Vol 06.01.
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