ASTM F410-95
(Test Method)Standard Test Method for Wear Layer Thickness of Resilient Floor Coverings by Optical Measurement
Standard Test Method for Wear Layer Thickness of Resilient Floor Coverings by Optical Measurement
SCOPE
1.1 This test method covers the determination of the thickness of the wear layer of resilient non-textile floor coverings, in tile or sheet form, with or without felt backing or foam layer, by optical measurement.
1.2 This test method is applicable for wear layers with a minimum thickness of 0.0004 in. (0.01 mm) to a maximum thickness of 0.1 in. (2.54 mm), where measurements within 0.0001 in. or 0.0025 mm are tolerable.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: F 410 – 95
Standard Test Method for
Wear Layer Thickness of Resilient Floor Coverings by
Optical Measurement
This standard is issued under the fixed designation F 410; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.4 Holder—A means for holding the specimen, without
distortion, so that the cut edge is perpendicular to the optical
1.1 This test method covers the determination of the thick-
axis of the microscope.
ness of the wear layer of resilient non-textile floor coverings, in
3.5 Sharp Knife, or razor blade in a holder, for cutting the
tile or sheet form, with or without felt backing or foam layer,
specimen.
by optical measurement.
3.6 Cutting Board of plastic, hardboard or fine-grained
1.2 This test method is applicable for wear layers with a
hardwood.
minimum thickness of 0.0004 in. (0.01 mm) to a maximum
3.7 Straightedge, for guiding the cutting edge.
thickness of 0.1 in. (2.54 mm), where measurements within
0.0001 in. or 0.0025 mm are tolerable.
4. Test Specimen
1.3 The values stated in inch-pound units are to be regarded
4.1 The specimen shall be cut from a properly selected
as the standard. The values given in parentheses are for
sample, representing the area to be measured. It shall be
information only.
approximately 2 in. (50 mm) long on the edge to be measured
1.4 This standard does not purport to address all of the
by about 0.5 in. (13 mm) in width.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Procedure
priate safety and health practices and determine the applica-
5.1 Preparation of Specimen—Place the sample on the
bility of regulatory limitations prior to use.
cutting board with the face side up. Hold the cutting instrument
2. Significance and Use so that the plane of the blade is perpendicular to the face of the
sample. The cutting edge of the blade should be at an angle to
2.1 This test method is applicable for wear layers with a
the horizontal that produces a clean cut. It is essential that the
minimum thickness of 0.001 in. (0.02 mm) to a maximum
cut is perpendicular to the face of the sample. Apply sufficient
thickness of 0.1 in. (2.54 mm), where measurements within
pressure so that a clean cut can be made completely through the
0.0005 in. or 0.01 mm are tolerable.
sample in one stroke, being careful not to distort the sample or
3. Apparatus turn the knife from the perpendicular. The cut should be
straight, and at least 2 in. (50 mm) long. Make a similar cut
3.1 Compound Microscope, having a magnification of at
parallel to the first cut, about 0.5 in. (13 mm) apart. Cut each
least 403, equipped with an eyepiece micrometer of the ruled
end, so the specimen can be removed from the sample.
disk or filar type. The scale shall cover approximately 0.1 in.
5.2 Thickness Measurement:
(2.54 mm) and each division shall be equal to approximately
5.2.1 Mount the specimen with the long edge up, the cut
0.0004 in. (0.01 mm) at the object. Either a binocular or
surface perpendicular to the optical axis of the microscope (see
standard microscope may be used.
Appendix X1).
3.2 Vertical Illuminator (recommended), to illuminate the
5.2.2 Calibration—Calibrate the eyepiece micrometer
specimen. If another source is used, the light should fall on the
against the stage micrometer, and record the calibration factor.
specimen from as nearly vertical direction as possible.
If a variable magnification (zoom) instrument, or one with
3.3 Stage Micrometer, for calibrating the eyepiece mi-
adjustable tube length is used, be sure that these adjustments
crometer. The scale shall have the smallest division equal to
are not disturbed between calibration and measurement of the
0.0004 in. (0.01 mm) and shall cover at least 0.1 in. (2.54 mm).
sample.
5.2.3 Measurement with Ocular Micr
...
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