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ASTM D2129-97

(Test Method)

Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-Cobalt Scale)

Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-Cobalt Scale)

SCOPE
1.1 This test method covers a procedure for the visual determination of the color of askarels and other clear liquids.  
1.2 The values stated in acceptable metric units are to be regarded as the 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.

General Information

Status
Historical
Publication Date
09-Dec-1997
ICS
17.180.20 - Colours and measurement of light
Technical Committee
D27 - Electrical Insulating Liquids and Gases
Drafting Committee
D27.07 - Physical Test
Current Stage
Ref Project

Relations

Replaced By
ASTM D2129-05 - Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-Cobalt Scale)
Effective Date
01-Dec-2005
Referred By
ASTM D5282-05(2020) - Standard Test Methods for Compatibility of Construction Material with Silicone Fluid Used for Electrical Insulation
Effective Date
10-Dec-1997
Referred By
ASTM D117-22 - Standard Guide for Sampling, Test Methods, and Specifications for Electrical Insulating Liquids
Effective Date
10-Dec-1997
Referred By
ASTM D1524-15(2022) - Standard Test Method for Visual Examination of Used Electrical Insulating Liquids in the Field
Effective Date
10-Dec-1997
Referred By
ASTM D8240-22e1 - Standard Specification for Less-Flammable Synthetic Ester Liquids Used in Electrical Apparatus
Effective Date
10-Dec-1997
Referred By
ASTM D2225-20 - Standard Test Methods for Silicone Liquids Used for Electrical Insulation
Effective Date
10-Dec-1997
Referred By
ASTM D4652-20 - Standard Specification for Silicone Liquid Used for Electrical Insulation
Effective Date
10-Dec-1997

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ASTM D2129-97 - Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-Cobalt Scale)ASTM D2129-97 - Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-Cobalt Scale)
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ASTM D2129-97 - Standard Test Method for Color of Clear Electrical Insulating Liquids (Platinum-Cobalt Scale)
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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 2129–97
Standard Test Method for
Color of Clear Electrical
Insulating Liquids (Platinum-Cobalt Scale)
This standard is issued under the fixed designation D 2129; 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 4. Significance and Use
1.1 This test method covers a procedure for the visual 4.1 Color is significant chiefly as an indicator of contami-
determination of the color of askarels and other clear liquids. nation in electrical insulating liquids. Frequently this contami-
1.2 The values stated in acceptable metric units are to be nation is the result of solvent action between the askarel and
regarded as the standard. other materials in the apparatus involved. No definite relation-
1.3 This standard does not purport to address all of the ship can be established between color and the physical and
safety concerns, if any, associated with its use. It is the electrical characteristics of the liquid; for that reason color in
responsibility of the user of this standard to establish appro- itself has limited value as a measure of condition. For more
priate safety and health practices and determine the applica- precise determination of color, Test Method D 1209 may be
bility of regulatory limitations prior to use. used.
2. Referenced Documents 5. Apparatus
2.1 ASTM Standards: 5.1 Color Comparison Tubes—Matched, tall-form Nessler
D 1193 Specification for Reagent Water tubes, graduated at the 50-mL mark, and provided with
D 1209 Test Method for Color of Clear Liquids (Platinum- ground-on, optically clear glass caps.
Cobalt Scale) 5.2 Color Comparator—A color comparator constructed to
D 1500 Test Method for ASTM Color of Petroleum Prod- permit visual comparison of light transmitted through tall-form
ucts (ASTM Color Scale) Nessler tubes in the direction of their longitudinal axes. The
comparator should be constructed so that white light is passed
3. Summary of Test Method
through or reflected off a white glass plate and directed with
3.1 The color determined by this test method is a numerical
equal intensity through the tubes, and should be shielded so
value derived by comparing the color of the test specimen with that no light enters the tubes from the side.
that of a series of numbered color reference standards using
6. Reagents
transmitted light under prescribed conditions. The procedure
described is based on that for measuring the color of water and 6.1 Purity of Reagents—Use reagent grade chemicals in all
clear liquids according to the platinum-cobalt scale. This scale tests. Unless otherwise indicated, all reagents will conform to
is suitable for measurements over the color range from 5 to the specifications of the Committee on Analytical Reagents of
300. The color of test specimens darker than 300 on the the American Chemical Society, where such specifications are
platinum-cobalt scale must be measured according to the available. Other grades may be used, provided it is first
ASTM Color Scale as described in Test Method D 1500. The ascertained that the reagent is of sufficiently high purity to
use of the platinum-cobalt scale in this way is primarily of permit its use without lessening the accuracy of the determi-
value as an expansion of the lower part of the ASTM Color nation.
Scale, especially in the range between 0 and 1. 6.2 Purity of Water—Use reagent water conforming to
Specification D 1193.
This test method is under the jurisdiction of ASTM Committee on D-27 on
Electrical Insulating Liquids and Gases and is the direct responsibility of Subcom- A unit available from Scientific Glass and Instruments, Inc. P.O. Box 6,
mittee D 27.07 on Physical Tests. Houston, TX 77001, has been found suitable for this purpose.
Current edition approved Dec. 10, 1997. Published February 1998. Originally “Reagent Chemicals,American Chemical Society Specifications,”Am. Chemi-
published as D 2129 - 62 T. Last previous edition D 2129 - 90. cal Soc., Washington, DC. For suggestions on the testing of reagents not listed by
Annual Book of ASTM Standards, Vol 11.01. theAmerican Chemical Society, see “Reagent Chemicals and Standards,” by Joseph
Annual Book of ASTM Standards, Vol. 06.04. Rosin, D. Van Nostrand Co
...

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4.1 Color is significant chiefly as an indicator of contamination in electrical insulating liquids. Frequently this contamination is the result of solvent action in the apparatus involved or it may indicate possible contamination. No definite relationship can be established between color and the physical and electrical characteristics of the liquid; for that reason color in itself has limited value as a measure of condition. For more precise determination of color, Test Method D1209 may be used.
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5.1 The most direct and accessible methods for obtaining the color coordinates of object colors are by instrumental measurement using spectrophotometers or colorimeters with either hemispherical or bidirectional optical measuring systems. This test method provides procedures for such measurement by reflectance spectrophotometry using a hemispherical optical measuring system.  
5.2 This test method is especially suitable for measurement of the following types of specimens for the indicated uses (Guide E179 and Practice E805):  
5.2.1 All types of object-color specimens to obtain data for use in computer colorant formulation.  
5.2.2 Object-color specimens for color assessment.
5.2.2.1 For the measurement of plane-surface high-gloss specimens, the specular component should generally be excluded during the measurement.
5.2.2.2 For the measurement of plane-surface intermediate-gloss specimens and of textured-surface specimens, including textiles, where the first-surface reflection component may be distributed over a wide range of angles, measurement may be made with the specular component included, but the resulting color coordinates may not correlate best with visual judgments of the color. The use of bidirectional geometry, such as 45/0 or 0/45, may lead to better correlations.
5.2.2.3 For the measurement of plane-surface, low-gloss (matte) specimens, the specular component may either be excluded or included, as no significant difference in the results should be apparent.  
5.2.3 Specimens with bare metal surfaces for color assessment. For this application, the specular component should generally be included during the measurement.  
5.3 This test method is not recommended for measurement of the following types of specimens, for which the use of bidirectional measurement geometry (0/45 or 45/0) is preferable (Guide E179):  
5.3.1 Object-color specimens of intermediate gloss,  
5.3.2 Retroreflective specimens, and  
5.3.3 Fluorescent specimens (Practice E...
SCOPE
1.1 This test method describes the instrumental measurement of the reflection properties and color of object-color specimens by the use of a spectrophotometer or spectrocolorimeter with a hemispherical optical measuring system, such as an integrating sphere.  
1.2 The test method is suitable for use with most object-color specimens. However, it should not be used for retroreflective specimens or for fluorescent specimens when highest accuracy is desired. Specimens having intermediate-gloss surfaces should preferably not be measured by use of this geometry.  
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ASTM D3210-95(2023)(Test Method)
Standard Test Method for Comparing Colors of Films from Water-Emulsion Floor Polishes

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5.1 Whiteness index obtained from reflectance measurements on exaggerated dried polish films on filter paper can be used as a measurement of the color of such films.  
5.2 Whiteness index may be useful in predicting the potential discoloring effect of polish films on flooring substrates.  
5.3 Whiteness index should be useful in specifications when color comparisons are made with a standard sample polish.
SCOPE
1.1 This test method covers comparing colors of films (or solids) deposited from the emulsified particles in water emulsion floor polishes. It is based upon luminous reflectance measurements made with tristimulus colorimeters such as the Hunter Color Difference Meter.2  
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