ASTM D646-13
(Test Method)Standard Test Method for Mass Per Unit Area of Paper and Paperboard of Aramid Papers (Basis Weight) (Withdrawn 2022)
Standard Test Method for Mass Per Unit Area of Paper and Paperboard of Aramid Papers (Basis Weight) (Withdrawn 2022)
SIGNIFICANCE AND USE
4.1 Most paper is bought and sold in accordance with its mass per unit area, and therefore has great significance both to the consumer and the producer in defining price. Also, the values of many physical properties such as bursting strength, thickness, and bulk are interpreted and specified with regard to the particular mass per unit area involved.
SCOPE
1.1 This test method covers the determination of the mass per unit area of paper and paperboard.
1.2 In the SI metric units system, the mass per unit area of paper and paperboard is expressed in grams per square meter (g/m2).
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 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.
WITHDRAWN RATIONALE
This test method covers the determination of the mass per unit area of paper and paperboard.
Formerly under the jurisdiction of Committee D13 on Textiles, this test method was withdrawn in January 2022 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
General Information
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D646 − 13
Standard Test Method for
Mass Per Unit Area of Paper and Paperboard of Aramid
1
Papers (Basis Weight)
This standard is issued under the fixed designation D646; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript 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. Significance and Use
1.1 This test method covers the determination of the mass 4.1 Most paper is bought and sold in accordance with its
per unit area of paper and paperboard. mass per unit area, and therefore has great significance both to
the consumer and the producer in defining price. Also, the
1.2 In the SI metric units system, the mass per unit area of
values of many physical properties such as bursting strength,
paper and paperboard is expressed in grams per square meter
2 thickness, and bulk are interpreted and specified with regard to
(g/m ).
the particular mass per unit area involved.
1.3 The values stated in SI units are to be regarded as
5. Apparatus
standard. No other units of measurement are included in this
standard.
5.1 Weighing Device, readable and accurate to within
1.4 This standard does not purport to address all of the 0.25% of the applied load. When in use, the weighing device
safety concerns, if any, associated with its use. It is the shall be shielded from air currents.
responsibility of the user of this standard to establish appro-
5.2 Cutting Device, such as a “four square” cutter, or other
priate safety and health practices and determine the applica-
device for ensuring right angles between the edges.
bility of regulatory limitations prior to use.
5.2.1 When a template is used for preparing test specimens,
the paper should be cut to exact size with a sharp knife on a
2. Referenced Documents
hard surface, such as a hardwood board.
2
2.1 ASTM Standards:
5.3 Scale, such as a finely graduated steel rule reading in
D123Terminology Relating to Textiles
0.5mm, capable of measuring the dimensions of the test
D685Practice for Conditioning Paper and Paper Products
specimen to an accuracy of 0.2 %.
for Testing
D1776Practice for Conditioning and Testing Textiles 6. Sampling
6.1 Sampling shall be consistent with documented internal
3. Summary of Test Method
practices as agreed upon between sellers and buyers before
3.1 The area of several sheets of the paper or paperboard is purchase.
determined from linear measurements and the mass is deter-
6.2 From each test unit of the sample, cut a sheet with a
mined by weighing. The test-result is calculated from the ratio
dimension of 200 6 5 × 200 6 5 mm.
of the mass to the area.
7. Calibration
7.1 Checking of Weighing Device:
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD13onTextiles
7.1.1 Check the accuracy of the weighing device frequently
and is the direct responsibility of Subcommittee D13.19 on Industrial Fibers and
(7.3) by applying accurately measured masses with both
Metallic Reinforcements.
increasing and decreasing loads. When using a sheet-weighing
Current edition approved July 1, 2013. Published August 2013. Originally
device, be sure that the device has been properly calibrated to
approvedin1941.Lastpreviouseditionapprovedin2007asD646–96(2007)which
was withdrawn February 2010 and reinstated in July 2013. This test method is
the required accuracy (5.1).
related to TAPPI T 410 om-13, which is technically identical, and is similar to
7.1.2 Before each use, see that frictional effects are suffi-
International Standard ISO 536, Paper and Board—Determination of Grammage.
ciently minimal and that the zero reading is sufficiently correct
DOI: 10.1520/D0646-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or as to ensure the required weighing accuracy.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.2 CheckingofCuttingDevice—Frequently(7.3)checkthe
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. cutting by using the scale (5.3) to measure the lengths of the
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D646 − 13
four sides of 20 test specimens.Accuracy is attained when the M M
BW 5 5 (1)
standard deviation of all lengths is less than 0.5 % of the mean A H·W
length.
where:
7.3 Frequency of Checking—The frequency of checking in
M = the mass of the specimen, g,
2
7.1 and 7.2 should be based on experience. A new device
A = the area of the specimen, m ,
should be checked several times before bein
...
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