ASTM D1209-05(2019)
(Test Method)Standard Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)
Standard Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)
SIGNIFICANCE AND USE
3.1 The property of color of a solvent varies in importance with the application for which it is intended, the amount of color that can be tolerated being dependent on the color characteristics of the material in which it is used. The paint, varnish, and lacquer solvents, or diluents commercially available on today's market normally have little or no color. The presence or absence of color in such material is an indication of the degree of refinement to which the solvent has been subjected or of the cleanliness of the shipping or storage container in which it is handled, or both. (A) This is platinum-cobalt color No. 10 in Guide D365.
3.2 For a number of years the term “water-white” was considered sufficient as a measurement of solvent color. Several expressions for defining “water-white” gradually appeared and it became evident that a more precise color standard was needed. This was accomplished in 1952 with the adoption of Test Method D1209 using the platinum-cobalt scale. This test method is similar to the description given in Standard Methods for the Examination of Water and Waste Water4 and is referred to by many as “APHA Color.” The preparation of these platinum-cobalt color standards was originally described by A. Hazen in the American Chemical Journal5 in which he assigned the number 5 (parts per ten thousand) to his platinum-cobalt stock solution. Subsequently, in their first edition (1905) of Standard Methods for the Examination of Water, the American Public Health Association, using exactly the same concentration of reagents, assigned the color designation 500 (parts per million) which is the same ratio. The parts per million nomenclature is not used since color is not referred directly to a weight relationship. It is therefore recommended that the incorrect term “Hazen Color” should not be used. Also, because it refers primarily to water, the term “APHA Color” is undesirable. The recommended nomenclature for referring to the color of organic liquid...
SCOPE
1.1 This test method describes a procedure for the visual measurement of the color of essentially light colored liquids (Note 1). It is applicable only to materials in which the color-producing bodies present have light absorption characteristics nearly identical with those of the platinum-cobalt color standards used.
Note 1: A procedure for estimating color of darker liquids, described for soluble nitrocellulose base solutions, is given in Guide D365.
1.2 For purposes of determining conformance of an observed or a calculated value using this test method to relevant specifications, test result(s) shall be rounded off “to the nearest unit” in the last right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E29.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 For specific hazard information, see the Material Safety Data Sheet.
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements see Section 6.
1.6 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
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: D1209 − 05 (Reapproved 2019)
Standard Test Method for
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Color of Clear Liquids (Platinum-Cobalt Scale)
This standard is issued under the fixed designation D1209; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 2. Referenced Documents
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2.1 ASTM Standards:
1.1 This test method describes a procedure for the visual
D156 Test Method for Saybolt Color of Petroleum Products
measurement of the color of essentially light colored liquids
(Saybolt Chromometer Method)
(Note 1). It is applicable only to materials in which the
D365 Guide for Soluble Nitrocellulose Base Solutions
color-producing bodies present have light absorption charac-
D1193 Specification for Reagent Water
teristicsnearlyidenticalwiththoseoftheplatinum-cobaltcolor
E29 Practice for Using Significant Digits in Test Data to
standards used.
Determine Conformance with Specifications
NOTE 1—A procedure for estimating color of darker liquids, described
E202 Test Methods for Analysis of Ethylene Glycols and
for soluble nitrocellulose base solutions, is given in Guide D365.
Propylene Glycols
E346 Test Methods for Analysis of Methanol (Withdrawn
1.2 For purposes of determining conformance of an ob-
3
2017)
served or a calculated value using this test method to relevant
specifications, test result(s) shall be rounded off “to the nearest
3. Significance and Use
unit” in the last right-hand digit used in expressing the
3.1 The property of color of a solvent varies in importance
specification limit, in accordance with the rounding-off method
with the application for which it is intended, the amount of
of Practice E29.
color that can be tolerated being dependent on the color
1.3 The values stated in SI units are to be regarded as
characteristics of the material in which it is used. The paint,
standard. No other units of measurement are included in this
varnish, and lacquer solvents, or diluents commercially avail-
standard.
able on today’s market normally have little or no color. The
presence or absence of color in such material is an indication
1.4 For specific hazard information, see the Material Safety
of the degree of refinement to which the solvent has been
Data Sheet.
subjected or of the cleanliness of the shipping or storage
1.5 This standard does not purport to address all of the
container in which it is handled, or both.
safety concerns, if any, associated with its use. It is the
3.2 For a number of years the term “water-white” was
responsibility of the user of this standard to establish appro-
considered sufficient as a measurement of solvent color.
priate safety, health, and environmental practices and deter-
Several expressions for defining “water-white” gradually ap-
mine the applicability of regulatory limitations prior to use.
pearedanditbecameevidentthatamoreprecisecolorstandard
For specific hazard statements see Section 6.
was needed. This was accomplished in 1952 with the adoption
1.6 This international standard was developed in accor-
of Test Method D1209 using the platinum-cobalt scale. This
dance with internationally recognized principles on standard-
test method is similar to the description given in Standard
4
ization established in the Decision on Principles for the
Methods for the Examination of Water and Waste Water and is
Development of International Standards, Guides and Recom-
referredtobymanyas“APHAColor.”Thepreparationofthese
mendations issued by the World Trade Organization Technical
platinum-cobalt color standards was originally described byA.
Barriers to Trade (TBT) Committee.
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
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This test method is under the jurisdiction of ASTM Committee D01 on Paint Standards volume information, refer to the standard’s Document Summary page on
and Related Coatings, Materials, andApplications and is the direct responsibility of the ASTM website.
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Subcommittee D01.35 on Solvents, Plasticizers, and Chemical Intermediates. The last approved version of this historical standard is referenced on
Current edition approved April 1, 2019. Published April 2019. Originally www.astm.org.
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approved in 1952. Last previous edition approved in 2011 as D1209 – 05 (2011). Standard Methods for the Examination of Water and Waste Water, M. Franson,
DOI: 10.1520
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