ASTM C735-93(1999)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: C 735 – 93 (Reapproved 1999)
Standard Test Method for
Acid Resistance of Ceramic Decorations on Returnable Beer
and Beverage Glass Containers
This standard is issued under the fixed designation C 735; 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 volumes of distilled water. This will produce nominal 11.5
weight % HCl. The volume of the solution may be varied as
1.1 This test method covers qualitative determination of the
needed.
acid resistance of ceramic decorations on returnable beer and
beverage containers, to assure the necessary durability of the
6. Test Specimen
decoration.
6.1 The decorated ware should be representative of the lot,
1.2 This test provides an indication of performance when
or run, and should be taken in accordance with the principles
and if the decoration is to be exposed to the acid solutions used
stated in Practice C 224.
in reclaiming bottles, and it also covers those instances where
the beverages themselves have acidic properties.
7. Procedure
1.3 This standard does not purport to address all of the
7.1 Pour the HCl (27 + 73) into a beaker large enough to
safety concerns, if any, associated with its use. It is the
accept all of the test specimen and the reference sample. Keep
responsibility of the user of this standard to establish appro-
this solution at room temperature (25 6 5°C).
priate safety and health practices and determine the applica-
7.2 Place the test specimen into the HCl so that approxi-
bility of regulatory limitations prior to use.
mately one half of the label is immersed, and cover the beaker.
7.3 Remove the specimen from the HCl after 20 min. Rinse
2. Referenced Documents
with water and dry.
2.1 ASTM Standards:
2 7.4 Record the temperature of the HCl at both the beginning
C 224 Practice for Sampling Glass Containers
and the end of the test period.
3. Summary of Test Method 7.5 Retain a duplicate piece of ware with each decoration
under test, without exposure to HCl as an aid in judging the
3.1 This test method is a qualitative method which deter-
degree of chemical attack on the specimens under test.
mines by visual inspection the degree of attack of a nominal
10 % hydrochloric acid solution on the ceramic decoration.
8. Interpretation of Results
4. Significance and Use 8.1 Judge the degree of the HCl attack on the decorated
surface by visually comparing the exposed specimen to the
4.1 This test method evaluates the quality and serviceability
nonexposed specimen, if such is available.
of ceramic decorations on returnable beer and beverage con-
8.2 Grade the decoration on the test specimen according to
tainers.
one of the following classes:
4.2 This test method is also suitable for specification accep-
Grade 1—No attack apparent.
tance. Its significance is that bottles with good acid resistance
Grade 2—Appearance of iridescence or visible stain on the
coatings have longer service life.
exposed surface when vi
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