ASTM F410-08(2022)

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: F410 − 08 (Reapproved 2022)
Standard Test Method for
Wear Layer Thickness of Resilient Floor Coverings by
Optical Measurement
ThisstandardisissuedunderthefixeddesignationF410;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
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 3. Significance and Use
3.1 This test method is applicable for wear layers with a
1.1 This test method covers the determination of the thick-
minimum thickness of 0.001 in. (0.02 mm) to a maximum
nessofthewearlayerofresilientnon-textilefloorcoverings,in
thickness of 0.1 in. (2.54 mm), where measurements within
tile or sheet form, with or without felt backing or foam layer,
0.0005 in. or 0.01 mm are tolerable.
by optical measurement.
1.2 This test method is applicable for wear layers with a
4. Apparatus
minimum thickness of 0.0004 in. (0.01 mm) to a maximum
4.1 Compound Microscope, having a magnification of at
thickness of 0.1 in. (2.54 mm), where measurements within
least 40×, equipped with an eyepiece micrometer of the ruled
0.0001 in. or 0.0025 mm are tolerable.
disk or filar type. The scale shall cover approximately 0.1 in.
1.3 The values stated in inch-pound units are to be regarded
(2.54 mm) and each division shall be equal to approximately
as standard. The values given in parentheses are mathematical
0.0004 in. (0.01 mm) at the object. Either a binocular or
conversions to SI units that are provided for information only
standard microscope may be used.
and are not considered standard.
4.2 Vertical Illuminator (recommended), to illuminate the
1.4 This standard does not purport to address all of the
specimen. If another source is used, the light should fall on the
safety concerns, if any, associated with its use. It is the
specimen from as nearly vertical direction as possible.
responsibility of the user of this standard to establish appro-
4.3 Stage Micrometer, for calibrating the eyepiece microm-
priate safety, health, and environmental practices and deter-
eter. The scale shall have the smallest division equal to
mine the applicability of regulatory limitations prior to use.
0.0004in.(0.01mm)andshallcoveratleast0.1in.(2.54mm).
1.5 This international standard was developed in accor-
Thereferencestandardusedforcalibrationshallbetraceableto
dance with internationally recognized principles on standard-
a National Standard.
ization established in the Decision on Principles for the
4.4 Holder—A means for holding the specimen, without
Development of International Standards, Guides and Recom-
distortion, so that the cut edge is perpendicular to the optical
mendations issued by the World Trade Organization Technical
axis of the microscope.
Barriers to Trade (TBT) Committee.
4.5 Sharp Knife, or razor blade in a holder, for cutting the
2. Referenced Documents
specimen.
4.6 Cutting Board of plastic, hardboard or fine-grained
2.1 ASTM Standards:
hardwood.
E691Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
4.7 Straightedge, for guiding the cutting edge.
5. Test Specimen
ThistestmethodisunderthejurisdictionofASTMCommitteeF06onResilient 5.1 The specimen shall be cut from a properly selected
Floor Coverings and is the direct responsibility of Subcommittee F06.20 on Test
sample, representing the area to be measured. It shall be
Methods.
approximately 2 in. (50 mm) long on the edge to be measured
Current edition approved Oct. 1, 2022. Published October 2022. Originally
by about 0.5 in. (13 mm) in width.
approved in 1975. Last previous edition approved in 2017 as F410–08 (2017). DOI:
10.1520/F0410-08R22.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 6. Procedure
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1 Preparation of Specimen—Place the sample on the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. cuttingboardwiththefacesideup.Holdthecuttinginstrument
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F410 − 08 (2022)
TABLE 1 Precision
so that the plane of the blade is perpendicular to the face of the
A B C D E
sample. The cutting edge of the blade should be at an angle to Materials Average Sr SR r R
Material A 18.2147 0.5340 1.0808 1.4952 3.0261
the horizontal that produces a clean cut. It is essential that the
Material B 19.5567 1.2854 1.3938 3.5992 3.9028
cut is perpendicular to the face of the sample.Apply sufficient
Material C 33.8173 0.5305 0.9218 1.4855 2.5811
pressuresothatacleancutcanbemadecompletelythroughthe Material D 10.7353 0.3833 0.3992 1.0734 1.1176
Material E 21.0273 0.7411 1.306 2.0750 2.8858
sample in one stroke, being careful not to distort the sample or
A
Average is the arithmetic mean of optical thickness measurements for all
turn the knife from the perpendicular. The cut should be
replicates from all laboratories of each material.
straight, and at least 2 in. (50 mm) long. Make a similar cut
B
Sr is the within-laboratory standard deviation of the average.
C
parallel to the first cut, about 0.5 in. (13 mm) apart. Cut each
SR is the between-laboratory standard deviation of the average.
D
r = 2.83 Sr.
end, so the specimen can be removed from the sample.
E
R=2.83SR.
6.2 Thickness Measurement:
6.2.1 Mount the specimen with the long edge
...