ASTM D3521-86(2002)
(Test Method)Standard Test Method for Surface Wax Coating On Corrugated Board
Standard Test Method for Surface Wax Coating On Corrugated Board
SCOPE
1.1 This test method covers determination of the weight of wax that is present as a coating on the surface of corrugated board. This method is applicable to board to which wax has been applied by curtain coating, roll coating, or other methods; the substrate board may or may not contain impregnating (saturating) wax within its structure.
Note 1—If it is known that the specimen has coating wax only, with no internal saturating wax, the total coating wax applied may be determined by Test Method D 3344.
1.2 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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An American National Standard
Designation:D3521–86(Reapproved2002)
Standard Test Method for
Surface Wax Coating On Corrugated Board
This standard is issued under the fixed designation D 3521; 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 ripple-free sheet, then scraping off the wax using a razor blade
and calculating the wax removed.
1.1 This test method covers determination of the weight of
wax that is present as a coating on the surface of corrugated
5. Significance and Use
board. This method is applicable to board to which wax has
5.1 Wax coatings are applied to corrugated board to provide
been applied by curtain coating, roll coating, or other methods;
a better barrier against moisture or other agents or to provide
the substrate board may or may not contain impregnating
improved appearance or abrasion resistance. These perfor-
(saturating) wax within its structure.
mance features are influenced by the amount of wax present on
NOTE 1—If it is known that the specimen has coating wax only, with no
the surface.
internal saturating wax, the total coating wax applied may be determined
5.2 During most coating operations, the major portion of the
by Test Method D 3344.
wax applied will congeal on the surface, while a minor
1.2 This standard does not purport to address all of the
proportion will migrate into and become embedded in the
safety concerns, if any, associated with its use. It is the
fibers of the facing. This method measures only the portion on
responsibility of the user of this standard to establish appro-
the surface.
priate safety and health practices and determine the applica-
6. Apparatus
bility of regulatory limitations prior to use.
6.1 Sample-Trimming Equipment—A suitable trimming
2. Referenced Documents
board or template arrangement equipped with a razor edge
2.1 ASTM Standards:
knife for even cutting of specimens to required size, with
D 585 Practice for Sampling andAccepting a Single Lot of
parallel sides. (A guillotine-type paper cutter is not recom-
Paper, Paperboard, Fiberboard, or Related Product
mended.)
D 3344 Test Method for Total Wax Content of Corrugated
6.2 Measuring Rule, steel edged, for measuring the size of
Paperboard
specimen to within 0.5 mm.
6.3 Razor Blades, common single-edge, having a rigid rim
3. Terminology
for holding in the fingers. The blade is used for surface wax
3.1 Definition:
scraping and an adequate supply of fresh blades with sharp
3.1.1 weight of wax coating—the weight of wax present as
edges is required.
a surface film on corrugated paperboard, expressed as weight
6.4 Analytical Balance, reading to nearest 1 mg.
per unit area, usually grams per square metre or pounds of
7. Sampling and Test Specimen
coating per thousand feet of board covered.
3.1.1.1 Discussion—This definition excludes any portion of
7.1 From each test unit, obtained in accordance with Prac-
wax that is located below the surface, that may have been
tice D 585, that is, each finished carton blank or paperboard
permitted to soak into the fibrous paperboard structure.
sheet, cut specimens free from obvious defects. Each specimen
should measure 100 by 100 mm, cut to the nearest 0.5 mm.
4. Summary of Test Method
Record the area of the surface to be tested, and whether it is an
4.1 The amount of wax present as a coating on the surface
insideoroutsidefacing.Duplicatespecimensarerequiredfrom
is determined by delaminating the coated facing to obtain a
each sample unit.
NOTE 2—The operator may be required to increase the replication and
This test method is under the jurisdiction of ASTM Committee D02 on
treatment of specimens to obtain a better estimate of “average” wax
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
loading, (1) if the waxing is at an extremely low level, or (2) if the wax
D02.10.0A on Physical and Chemical Properties.
loading shows obvious wide variations in distribution over the board area.
Current edition approved Oct. 31, 1986. Published December 1986. Originally
NOTE 3—Optionally, specimens of other dimensions may be used if
e1
published as D 3521 – 76. Last previous edition D 3521 – 75 (1981) .
required by sampling limitations. In such cases, calculations need to be
Annual Book of ASTM Standards, Vol 15.09.
3 appropriately adjusted.
Annual Book of ASTM Standards, Vol 05.02.
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D3521–86 (2002)
7.2 Condition all boards at 23°C (73°F) and 50 % relative 9. Calculation
humidity for a minimum of 48 h before beginning test
9.1 Calculate the weight of surface coating on the facing, a,
procedure.
in g/m , as follows:
c 2 d
8. Procedure a 5 (1)
b
8.1 Take each duplicate specimen and separate the coated
where:
facing from the combined board as follows:
b = specimen area, total, m ,
8.1.1 Delaminate the fibers of the facing in a manner that
c = weight of duplicate delaminated facings, before scrap-
causes minimum disturbance of the surface coating and pro-
ing, g, and
duces a thin continuous paper sheet. To do this, pry with a
d = weight of facing
...
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