ASTM-E1347:2003 Edition

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E1347-03 Standard Test Method for Color and Color-Difference Measurement by Tristimulus (Filter) Colorimetry

Published By	Publication Date	Number of Pages
ASTM	2003	4

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Categories: 17.180.20 - Colours and measurement of light, ASTM

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Description

ASTM E1347-03

Historical Standard: Standard Test Method for Color and Color-Difference Measurement by Tristimulus (Filter) Colorimetry

ASTM E1347

Scope

1.1 This test method describes the instrumental measurement of specimens resulting in color coordinates and color difference values by using a tristimulus (filter) colorimeter, also known as a color-difference meter. This test method does not apply to the use of a spectrocolorimeter, which is a spectrophotometer that is normally capable of producing as output colorimetric data, but not the underlying spectral data from which color coordinates are calculated. Measurement by using a spectrocolorimeter is covered in Practice E 1164 and methods on color measurement by spectrophotometry.

1.2 Provision is made in this test method for the measurement of color coordinates and color differences by reflected light using either a hemispherical optical measuring system, such as an integrating sphere, or a bidirectional optical measuring system, such as annular, circumferential, or uniplanar 45/0 or 0/45 geometry. Provision is also made for measurement by transmitted light using a hemispherical optical measuring system.

1.3 Because of the limited absolute accuracy of tristimulus (filter) colorimeters, this test method specifies that, when color coordinates are required, the instrument be standardized by use of a standard having similar spectral (color) and geometric characteristics to those of the specimen. The use of a product standard of suitable stability is highly desirable.

1.4 Because of the inability of tristimulus (filter) colorimeters to detect metamerism or paramerism, or to correctly measure metameric or parameric pairs of specimens, this test method specifies that, when color differences are required, the two specimens must have similar spectral (color) and geometric characteristics. In this case, the instrument may be standardized for reflectance measurement by use of a white reflectance standard or, for transmittance measurement, with no specimen or standard at the specimen position.

1.5 While this test method is generally suitable for all object-color specimens, it should not be used without observing certain restrictions on the geometries and standardization procedures appropriate for different types of specimens and uses, and on the spectral character (metamerism or paramerism) of specimens and standards.

1.6 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.

Keywords

bidirectional geometry; color; color difference; colorimeter; filter colorimeter; integrating sphere; tristimulus colorimeter

ICS Code

ICS Number Code 17.180.20 (Colours and measurement of light)

DOI: 10.1520/E1347-03

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Summary of Test Method
2	Significance and Use
3	Apparatus Test Specimens Standardization and Verification Procedure TABLE 1
4	Calculation Report Precision and Bias Keywords

Additional information

Standard Title	E1347-03 Standard Test Method for Color and Color-Difference Measurement by Tristimulus (Filter) Colorimetry
Published Code	ASTM
Publication Date	2003
Pages Count	4
ICS Codes	17.180.20 - Colours and measurement of light