ASTM D3210-95(2002)
(Test Method)Standard Test Method for Comparing Colors of Films from Water-Emulsion Floor Polishes
Standard Test Method for Comparing Colors of Films from Water-Emulsion Floor Polishes
SIGNIFICANCE AND USE
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.
Whiteness index may be useful in predicting the potential discoloring effect of polish films on flooring substrates.
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.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D3210–95 (Reapproved 2002)
Standard Test Method for
Comparing Colors of Films from Water-Emulsion Floor
Polishes
This standard is issued under the fixed designation D 3210; 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 L 5 10 Yb 5 7.0 ~Y 2 0.847 Z!/ Y (2)
= =
1.1 This test method covers comparing colors of films (or
solids) deposited from the emulsified particles in water emul-
4. Summary of Test Method
sion floor polishes. It is based upon luminous reflectance
4.1 Reflectance measurements are made on exaggerated or
measurements made with tristimulus colorimeters such as the
heavy dried polish films produced by saturating white filter
Hunter Color Difference Meter.
paper.The color measurement is expressed as whiteness index.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
5. Significance and Use
only.
5.1 Whiteness index obtained from reflectance measure-
1.3 This standard does not purport to address all of the
ments on exaggerated dried polish films on filter paper can be
safety concerns, if any, associated with its use. It is the
used as a measurement of the color of such films.
responsibility of the user of this standard to establish appro-
5.2 Whiteness index may be useful in predicting the poten-
priate safety and health practices and determine the applica-
tial discoloring effect of polish films on flooring substrates.
bility of regulatory limitations prior to use.
5.3 Whiteness index should be useful in specifications when
color comparisons are made with a standard sample polish.
2. Referenced Documents
2.1 ASTM Standards:
6. Apparatus
E 259 Practice for Preparation of Reference White Reflec-
6.1 Tristimulus Colorimeter, which gives reflectance read-
tance Standards
ings which in turn are converted by calculations to L, a, and b
color scale values, or these color scale values may be read
3. Terminology
directly from an instrument that automatically makes the
3.1 Definition:
calculations. Other apparatus is satisfactory if equivalent re-
3.1.1 whiteness index—a color measurement calculated
4 sults are obtained.
from the equation
6.2 Filter Paper, medium flow rate, cut into strips 76.2 by
WI 5 L 2 3b (1)
152.4 mm (3 in. by 6 in.).
6.3 Spring Clamp, approximately 76 mm (3 in.) wide, two
where L and b are values measured directly with the Color
are required.
Difference Meter. L measures lightness, which is 100 for
NOTE 1—The following instruments are believed to provide color
perfectly white and zero for black; and b measures yellowness
difference measurements suitable for use with this procedure:
when plus, blueness when minus, and zero for neutral gray or
(1) Hunter Color Difference Meter.
white. Conversion factors for instruments reading in X, Y, Z
(2) Color Eye Colorimeter.
units are:
(3) General Electric Recording Spectrophotometer.
(4) Colormaster Differential Colorimeter.
(5) Gardner Color Difference Meter.
ThistestmethodisunderthejurisdictionofASTMCommitteeD21onPolishes
and is the direct responsibility of Subcommittee D21.04 on Performance Tests. 7. Reference Standards
Current edition approved Nov. 10, 1995. Published May 1996. Originally
7.1 Primary Standard—The primary standard for reflec-
published as D 3210 – 73. Last previous edition D 3210 – 73 (1988).
tance measurement is a layer of freshly prepared magnesium
Hunter, R. S., “Photoelectric Color Difference Meter,” Journal of the Optical
Society, Vol. 48, 1958, p. 985.
oxide prepared in accordance with Recommended Practice
Annual Boo
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