ASTM D4890-18
(Test Method)Standard Test Methods for Polyurethane Raw Materials: Determination of Gardner and APHA Color of Polyols
Standard Test Methods for Polyurethane Raw Materials: Determination of Gardner and APHA Color of Polyols
SIGNIFICANCE AND USE
5.1 These test methods are suitable for quality control, as specification tests, and for research. Color is an important property of urethane products.
SCOPE
1.1 These test methods measure visually the color of clear polyester and polyether liquids. They apply only to materials whose colors have light-absorption characteristics similar to those of the standards. An alternative method is Test Method D1209 (see Note 1).
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.
Note 1: Test Method A of this standard is equivalent to ISO 6271-1. Test Method B of this standard is equivalent to ISO 4630-1.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
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Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D4890 − 18
Standard Test Methods for
Polyurethane Raw Materials: Determination of Gardner and
1
APHA Color of Polyols
This standard is issued under the fixed designation D4890; 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* D6166 Test Method for Color of Pine Chemicals and Re-
lated Products (Instrumental Determination of Gardner
1.1 These test methods measure visually the color of clear
Color)
polyester and polyether liquids. They apply only to materials
E177 Practice for Use of the Terms Precision and Bias in
whose colors have light-absorption characteristics similar to
ASTM Test Methods
those of the standards. An alternative method is Test Method
E308 Practice for Computing the Colors of Objects by Using
D1209 (see Note 1).
the CIE System
1.2 Units—The values stated in SI units are to be regarded
E691 Practice for Conducting an Interlaboratory Study to
as standard. No other units of measurement are included in this
Determine the Precision of a Test Method
standard.
E1164 Practice for Obtaining Spectrometric Data for Object-
1.3 This standard does not purport to address all of the
Color Evaluation
3
safety concerns, if any, associated with its use. It is the
2.2 ISO Standards:
responsibility of the user of this standard to establish appro-
ISO 4630-1 Clear Liquids—Estimation of Colour by the
priate safety, health, and environmental practices and deter-
Gardner Colour Scale—Part 1: Visual Method
mine the applicability of regulatory limitations prior to use.
ISO 4630-2 Clear Liquids—Estimation of Colour by the
Gardner Colour Scale—Part 2: Spectroscopic Method
NOTE 1—Test Method A of this standard is equivalent to ISO 6271-1.
ISO 6271-1 Clear Liquids—Estimation of Colour by the
Test Method B of this standard is equivalent to ISO 4630-1.
Platinum-Cobalt Scale—Part 1: Visual Method
1.4 This international standard was developed in accor-
ISO 6271-2 Clear Liquids—Estimation of Colour by the
dance with internationally recognized principles on standard-
Platinum-Cobalt Scale—Part 2: Spectroscopic Method
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
3. Terminology
mendations issued by the World Trade Organization Technical
3.1 For definitions of terms used in these test methods see
Barriers to Trade (TBT) Committee.
Terminology D883.
2. Referenced Documents
4. Summary of Test Method
2
2.1 ASTM Standards:
4.1 In Test Method A, the color of the material to be tested
D883 Terminology Relating to Plastics
is compared to a series of color standards with defined
D1193 Specification for Reagent Water
chromaticity coordinates, prepared in one of three ways. The
D1209 Test Method for Color of Clear Liquids (Platinum-
results are reported as the color standard, which best matches
Cobalt Scale)
the sample.
D5386 Test Method for Color of Liquids Using Tristimulus
4.2 In Test Method B, the color of the material to be tested
Colorimetry
is compared to a series of platinum-cobalt color standards,
designated by mg of Pt/mL of standard solution. The results are
reported as the color standard, which best matches the sample
1
These test methods are under the jurisdiction of Committee D20 on Plastics and
(see Note 2).
are the direct responsibility of Subcommittee D20.22 on Cellular Materials - Plastics
and Elastomers.
NOTE 2—Color of liquids are also measured by visible spectroscopy
Current edition approved Aug. 1, 2018. Published August 2018. Originally
and the results converted to any of several color scales. These results are
approved in 1988. Last previous edition approved in 2013 as D4890 - 13. DOI:
converted to the APHA scale by appropriate manipulations, as for example
10.1520/D4890-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D4890 − 18
in Test Method D5386 and ISO 6271-2. These results are converted to the
...
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: D4890 − 13 D4890 − 18
Standard Test Methods for
Polyurethane Raw Materials: Determination of Gardner and
1
APHA Color of Polyols
This standard is issued under the fixed designation D4890; 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 These test methods measure visually the color of clear polyester and polyether liquids. They apply only to materials whose
colors have light-absorption characteristics similar to those of the standards. An alternative method is Test Method D1209 (see
Note 1).
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this
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.
NOTE 1—Test Method A of this standard is equivalent to ISO 6271-1. Test Method B of this standard is equivalent to ISO 4630-1.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D883 Terminology Relating to Plastics
D1193 Specification for Reagent Water
D1209 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)
D5386 Test Method for Color of Liquids Using Tristimulus Colorimetry
D6166 Test Method for Color of Pine Chemicals and Related Products (Instrumental Determination of Gardner Color)
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E308 Practice for Computing the Colors of Objects by Using the CIE System
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E1164 Practice for Obtaining Spectrometric Data for Object-Color Evaluation
3
2.2 ISO Standards:
ISO 4630-1 Clear Liquids—Estimation of Colour by the Gardner Colour Scale—Part 1: Visual Method
ISO 4630-2 Clear Liquids—Estimation of Colour by the Gardner Colour Scale—Part 2: Spectroscopic Method
ISO 6271-1 Clear Liquids—Estimation of ColorColour by the Platinum-Cobalt Scale—Part 1: Visual Method
ISO 6271-2 Clear Liquids—Estimation of ColorColour by the Platinum-Cobalt Scale—Part 2: Spectroscopic Method
3. Terminology
3.1 For definitions of terms used in these test methods see Terminology D883.
1
These test methods are under the jurisdiction of Committee D20 on Plastics and are the direct responsibility of Subcommittee D20.22 on Cellular Materials - Plastics
and Elastomers.
Current edition approved April 1, 2013Aug. 1, 2018. Published April 2013August 2018. Originally approved in 1988. Last previous edition approved in 20062013 as
D4890 - 06.D4890 - 13. DOI: 10.1520/D4890-13.10.1520/D4890-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D4890 − 18
4. Summary of Test Method
4.1 In Test Method A, the color of the material to be tested is compared to a series of color standards with defined
chromicitychromaticity coordinates, prepared onin one of three ways. The results are reported as the color standard, which best
matches the sample.
4.2 In Test Method B, the color of the material to be tested is compared to a series of platinum-cobalt color standards, designated
by mg of Pt/mL of standard solution. The results are reported as the color standard, which best matches the sample (see Note 2).
NOTE 2—Color of liquids are also measured by visible spectroscopy and the results converted to any of sever
...
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