ASTM D2048-92(1996)

Designation: D 2048 – 92 (Reapproved 1996)
Standard Test Method for
Powdering of Floor Polish Films
This standard is issued under the fixed designation D 2048; 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 5.4 Volumetric Pipet, 2-mL.
5.5 Cheesecloth Applicator, washed to remove sizing; cut
1.1 This test method covers a bench procedure for the
into 50-mm (2-in.) strips of four-ply cloth; folded twice.
determination of the degree of powdering of floor polishes
5.6 Relative Humidity and Temperature Indicator.
under ambient conditions as well as conditions of low relative
5.7 Glove Box—An enclosure that houses the crockmeter
humidity.
keeping it in a constant humidity and temperature environment;
1.2 This standard does not purport to address all of the
features rubber glove inserts so that the tests may be run
safety concerns, if any, associated with its use. It is the
keeping the environment of the crockmeter constant.
responsibility of the user of this standard to establish appro-
5.8 Desiccant—Silica gel or calcium chloride.
priate safety and health practices and determine the applica-
5.9 Salts for Constant Humidity Conditions—LiCl·H O,
bility of regulatory limitations prior to use. 2
CaCl ·6H O, or Mg(NO ) ·6H O.
2 2 3 2 2
2. Referenced Documents
NOTE 1—Saturated aqueous solutions of the following salts in contact
2.1 ASTM Standards:
with an excess of a definite solid phase of salt at the indicated
temperatures and in an enclosed space will maintain the required constant
D 3153 Test Method for Recoatability of Water-Emulsion
humidities:
Floor Polishes
LiCl·H O at 25°C (77°F) yields 11.1 % relative humidity.
CaCl ·6H O at 10°C (50°F) yields 38.0 % relative humidity.
3. Terminology 2 2
Mg(NO ) ·6H O at 23.9°C (75°F) yields 42.9 % relative humidity.
3 2 2
3.1 Definition:
5.10 Fan, small, electric.
3.1.1 powdering—partial or total disintegration of the pol-
5.11 Metal Clip, to hold the abrading felt on the crockmeter
ish film resulting in a fine, light colored material.
surface during testing.
4. Significance and Use
6. Preparation of Test Sample
4.1 This is a comparative test method. If this method does
6.1 Clean the tile surface in accordance with Test Method
not indicate powdering, it is still possible that the product in
D 3153, paragraph 9.1.2, to ensure removal of any coating
actual use may powder.
present.
5. Apparatus
6.2 Pipet 2 mL of polish onto the center of the test panel.
Place the cheesecloth into the polish and allow it to absorb the
5.1 Textile Crockmeter, weighted with a 1-kg weight. The
emulsion. Distribute the emulsion evenly over the surface; then
weight is placed directly over the abrasion dowel and attached
draw the cheesecloth downward in smooth separate strokes,
with two-faced tape.
with no more pressure than is exerted by the weight of the
5.2 Abrading Felt—670 Kelly No. 720 billiard cloth cut
hand, until the entire panel has been coated. If 304 by 304-mm
into 50 by 50-mm (2 by 2-in.) squares.
(12 by 12-in.) tiles are used, pipet 3.6 mL of polish out the
5.3 Substrate—Official Vinyl Composition Tile (OVCT)
center of each tile.
shall be used in this test.
6.3 Apply a second coat of polish 1 h after the first. Apply
this coat in the same manner as the first coat.
This test method is under the jurisdiction of ASTM Committee D-21 on
6.4 One hour after the second coat of polish has dried, place
Polishes and is the responsibility of Subcommittee D21.04 on Performance Tests.
Current edition approved Aug. 15, 1992. Published October 1992. Originally
one of the test tiles in the glove box in which the relative
published as D 2048 – 64 T. Last previous edition D 2048 – 87.
humidity is 10 to 15 %. The low humidity is obtained and
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