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ASTM D1209-05(2019)
Standard Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)
Přeložit název
NORMA vydána dne 1.4.2019
Informace o normě:
Označení normy: ASTM D1209-05(2019)
Datum vydání normy: 1.4.2019
Kód zboží: NS-945764
Počet stran: 4
Přibližná hmotnost: 12 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM D1209-05(2019) :
Keywords:
clear liquids, color, platinum-cobalt color scale ,, ICS Number Code 87.040 (Paints and varnishes)
Doplňující informace
| Significance and Use | ||||||||||||
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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. 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 Water3.3 The petroleum industry uses the
Saybolt colorimeter Test Method D156 for measuring and defining the color
of hydrocarbon solvents; however, this system of color measurement
is not commonly employed outside of the petroleum industry. It has
been reported by various sources that a Saybolt color of +25 is
equivalent to 25 in the platinum-cobalt system or to colors
produced by masses of potassium dichromate ranging between 4.8 and
5.6 mg dissolved in 1 L of distilled water. Because of the
differences in the spectral characteristics of the several color
systems being compared and the subjective manner in which the
measurements are made, exact equivalencies are difficult to
obtain.
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| 1. Scope | ||||||||||||
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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. 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. |
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| 2. Referenced Documents | ||||||||||||
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