ASTM D3556-85(1995)
(Test Method)Standard Test Method for Deposition on Glassware During Mechanical Dishwashing
Standard Test Method for Deposition on Glassware During Mechanical Dishwashing
SCOPE
1.1 This test method covers a procedure for measuring performance of a mechanical dishwashing detergent in terms of the buildup of spots and film on glassware. It is designed to evaluate household automatic dishwasher detergents but can be used as a screening test for institutional dishwashing products.
1.2 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D 3556 – 85 (Reapproved 1995)
Standard Test Method for
Deposition on Glassware During Mechanical Dishwashing
This standard is issued under the fixed designation D 3556; 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 wash cycle. Use deionized or distilled water for the rinses
during this cleaning procedure. Do not use the drying cycle of
1.1 This test method covers a procedure for measuring
the machine until the tumblers appear to be free of soil or film.
performance of a mechanical dishwashing detergent in terms of
No “water break” should be evident when the tumblers have
the buildup of spots and film on glassware. It is designed to
been rinsed. Any other procedure (such as hand washing and
evaluate household automatic dishwasher detergents but can be
polishing) which yields tumblers that are spot- and film-free
used as a screening test for institutional dishwashing products.
may be used.
1.2 This standard does not purport to address all of the
4.3 Standard Tableware (Note 1) (optional, see Section 6):
safety concerns, if any, associated with its use. It is the
4.3.1 Suggested tableware is as follows, Dinner plates,
responsibility of the user of this standard to establish appro-
10-in. diameter, Salad plates, 7-in. diameter, Cereal bowls,
priate safety and health practices and determine the applica-
6-in. diameter, Saucers, 6-in. diameter, and Cutlery, stainless
bility of regulatory limitations prior to use.
steel.
2. Summary of Test Method
NOTE 1—A mixture of china and plastic dishes is recommended but is
2.1 Glass tumblers are given multiple washes in a mechani-
not essential; any standard quality type of dishware is satisfactory.
cal dishwasher in the presence of food soil and the levels of
4.3.2 For each machine used, six dinner plates, six knives,
spotting and filming allowed by the detergents under test are
six forks, and six spoons are required, plus optionally enough
compared visually.
of the other dishes to fill the lower rack of each machine (see
Section 6).
3. Significance and Use
4.4 Light Box for Visual Evaluation of Tumblers—A typical
3.1 This test method is intended as a laboratory screening
light box is rectangular, open to the front, and has dead black
test to determine performance of the detergent under actual use
inside surfaces. It is large enough to hold up to 15 tumblers side
conditions, but will not necessarily predict performance under
by side. Fluorescent lights are mounted in the base of the box
all end-use conditions.
in such a manner that light passes up through the tumblers. It
is preferable to have the light come only through the tumblers
4. Apparatus
and have the area surrounding them blocked out by suitable
4.1 Automatic Dishwasher(s)—Typical household machines
means.
should be selected. If more than one machine is required, pairs
with consecutive production numbers are recommended. For
5. Materials and Manufacture
further refinement, two or more pairs of differing makes,
5.1 Standard Food Soil Components: nonfat powdered
models, or ages (pair to pair) may be used.
milk, margarine, and wheat-based cooked cereal (optional).
4.2 Clear Undecorated Glass Tumblers, from8to15per
5.2 Standard Food Soil Preparation—A mixture of 80
machine, a larger number being used if it is planned to remove
weight % of margarine and 20 weight % of powdered milk is
one tumbler at intervals throughout the test (see Section 6). Ten
prepared. The margarine is warmed until fluid (not over 100°F
tumblers simplify scoring.
(37.8°C)) and the powdered milk is sifted in and mixed
4.2.1 Before each use, even if new, the glass tumblers may
thoroughly. The mixture should be refrigerated when not in use
be cleaned in a machine, first in a 1 % solution of citric acid
and not kept more than 2 weeks.
and then with a household automatic dishwashing detergent at
5.3 Optional Food Soil Preparation—This mixture consists
the manufacturer’s recommended use level, each in a normal
of 70 % margarine, 15 % powdered milk, and 15 % cooked
cereal. The cooked cereal is separately prepared as follows:
Add 45 g of cereal to 228 g of water, heat to boiling, and boil
This test method is under the jurisdiction of ASTM Committee D-12 on Soaps
for 5 min. Dissolve 100 g of powdered milk in 500 g of water
and Other Detergents, and is the direct responsibility of Subcommittee D 12.16on
and stir this solution into the cooked cereal. Continue stirring
Hard Surface Cleaning.
Current edition approved May 31, 1985. Published July 1985. Originally
as portions are removed to be combined with margarine and
published as D 3556–76 T. Last previous edition D 3556–79.
Libby No. 53, 10-oz (300-mL) size or Federal No. 812, 10.5-oz, (310-mL) size,
have been found satisfactory. Any commercial brand of these items is satisfactory.
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