ASTM F373-06

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Designation: F373 − 06
StandardTest Method for
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Embossed Depth of Resilient Floor Coverings
ThisstandardisissuedunderthefixeddesignationF373;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 4. Apparatus
1.1 Two important characteristics involved in the manufac-
4.1 Theapparatusshallconsistofacomparatorstandhaving
ture of resilient flooring relate to the smoothness of the wear
a flat anvil base at least 6 in. (15 cm) square, equipped with a
surface and the hardness of the layers under the wear surface.
dial micrometer graduated to 0.001 in. (0.02 mm), and a
The surfaces may vary from completely textured areas to 1
hemispherical pressure foot ⁄32 in. (0.80 mm) in diameter. The
portions that are flat but separated by textured areas. This test
foot shall exert a force of not more than 1 ozf (0.28 N) at any
method covers flooring with these interrupted wear surfaces
point in its travel.The force shall be obtained by an appropriate
which are not supported by soft, cushioned layers.
weight. The plunger of the gage shall be perpendicular to the
anvil.
1.2 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are for
5. Test Specimen
information only.
1.3 This standard does not purport to address all of the
5.1 The specimen shall be a piece of flooring at least 9 by 9
safety concerns, if any, associated with its use. It is the
in. (230 by 230 mm).
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Calibration
bility of regulatory limitations prior to use.
6.1 The calibration of the gage shall be verified by means of
2. Referenced Documents gage blocks or shim stock traceable to national standard of
2 known thickness of the appropriate thickness for the depths
2.1 ASTM Standards:
being measured.
E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
7. Conditioning
3. Significance
7.1 Condition the specimens at least 24 h at 73.4 6 3.6°F
3.1 This test method is designed to measure the vertical
(23 6 2°C) and 50 6 5 % relative humidity. Test at the same
distancebetweenanytwolevelsonthefaceoftheflooring,that
conditions.
is, between any two flat areas, between a flat area and any part
of a textured area, or between two textured areas. This vertical
8. Procedure
distance may be of interest in itself or it may be applied to the
8.1 Select the two types of areas on a specimen that are to
questions of: (1) how much of the thickness of the flooring is
be examined.
available before the pattern is destroyed; or (2) how deep the
depressed areas must be before valley printing ink is not
8.2 Zero the gage at a random point on the higher area.
walked on in normal traffic.
8.3 Move the gage to a random spot in the second area and
measure the depth.
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This test method is under the jurisdiction ofASTM Committee F06 on Resilient
8.4 When measuring on a nominally flat wearing surface, do
Floor Coverings and is the direct responsibility of Subcommittee F06.20 on Test
Methods - Products Construction/Materials. not place the tip close to a built-up shoulder area around a
Current edition approved Oct. 15, 2006. Published November 2006. Originally
depressed spot; such a shoulder reading would give an errone-
approved in 1973. Last previous edition approved in 2001 as F373–01. DOI:
ous result.
10.1520/F0373-06.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
8.5 Make five measurements per specimen scattered at
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
random over the specimen face. Record the measurements to
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. the nearest 0.001 in. (0.02 mm).
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F373 − 06
B
Sr is the within-laboratory standard deviation of the average.
9. Report
C
r = 2.83 Sr.
D
SR is the between-laboratory standard deviation of the average.
9.1 Report the average of the five measurements calculated
E
R=2.83SR.
to 0.001 in. (0.02 mm) as the depth between the two types of
10.3 Repeatability (Sr, r)—In comparing two average values
areas of interest.
for the same material obtained by the same operator using the
9.2 Report the minimum and maximum values obtained.
same equipment on the same day, the means should be jud
...