ASTM D2423-90(1997)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact
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Designation: D 2423 – 90 (Reapproved 1997) An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Surface Wax on Waxed Paper or Paperboard
This standard is issued under the fixed designation D 2423; 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 substrate. This test method, which mechanically removes the
wax, measures the amount on each surface of the substrate.
1.1 This test method covers determination of the weight of
wax on the surface of waxed paper.
6. Apparatus
1.2 This standard does not purport to address all of the
6.1 Pad of paper to be used as a cushion under the waxed
safety concerns, if any, associated with its use. It is the
paper specimens during the scraping operation.
responsibility of the user of this standard to establish appro-
6.2 Analytical Balance, capable of reproducing weights to
priate safety and health practices and determine the applica-
the nearest 0.001 g.
bility of regulatory limitations prior to use.
6.3 Razor Blade, single-edged for scraping the wax from the
specimen.
2. Referenced Documents
6.4 Trimming Board, or other device for cutting paper
2.1 ASTM Standards:
specimens. A paper cutter having an attachment for ensuring
D 585 Practice for Sampling and Accepting a Single Lot of
2 parallelism of the opposite edge of the trimmed sheet, or a
Paper, Paperboard, Fiberboard, or Related Product
template, or a die cutter is recommended.
D 646 Test Method for Grammage of Paper and Paperboard
6.5 Measuring Device, capable of measuring the size of the
(Weight per Unit Area)
specimen to an accuracy 0.5 mm.
3. Terminology
7. Sampling
3.1 Definitions:
7.1 Select samples that are free of wrinkles, cuts, or other
3.1.1 basis weight of paper—basis weight is expressed in
defects in accordance with Practice D 585.
grams per square metre. In countries where the metric system
is not universal, basis weight is also expressed in pounds per
8. Procedure
ream.
8.1 Prepare a specimen consisting of a 100 by 100-mm
3.1.2 ream of paper (news and wrapping)—500 sheets each
square of waxed paper. Determine the area (in square millime-
610 by 914 mm (24 by 36 in.).
tres) of each specimen to the nearest 1.0 % of its total area.
NOTE 1—For factors to convert basis weight in grams per square metre 8.2 Weigh the specimen on the analytical balance to the
to other commercial reams, see Test Method D 646.
nearest 0.5 % of its total weight.
8.3 Remove the surface wax from one side of the specimen
4. Summary of Test Method
(side No. 1) by scraping toward each of its four edges as
4.1 The quantity of wax present as a surface film on paper
follows: Hold the specimen firmly on the pad to prevent
or paperboard is determined through the difference in weight of
slippage. With a razor blade held vertically, scrape the entire
specimens before and after scraping with a razor blade.
area of one side of the specimen with repeated one-directional
strokes of the blade, slightly overlapping the strokes. Rotate the
5. Significance and Use
specimen through 90° and repeat the scraping. Continue
5.1 Many of the functional properties of waxed paper and
rotating and scraping twice more to complete the process.
paperboard are related to the amount of wax present as a
8.4 Reweigh the specimen as described in 8.2. Record the
surface film. Test methods which determine wax load by
weight of the specimen as the scraped basis weight side No
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