ASTM C1203-91(2002)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: C 1203 – 91 (Reapproved 2002)
Standard Test Method for
Quantitative Determination of Alkali Resistance of a
Ceramic-Glass Enamel
This standard is issued under the fixed designation C 1203; 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 4. Summary of Test Method
1.1 This test method covers the determination of the resis- 4.1 This test method measures the weight loss of a glass
tance of a fired ceramic-glass enamel to a 10 % alkali solution specimen decorated with a fired ceramic-glass enamel, when
held near its boiling point for 2 h. completely immersed in a 10 % alkali solution near its boiling
1.2 This test method is not applicable to large tempered point. A stainless steel beaker containing test samples and a
glass sheets or specimens larger than 9 by 9 cm. 10 % alkali solution is heated at 95°C in a temperature
1.3 This standard does not purport to address all of the controlled water bath for 2 h. Chemical dissolution of the
safety concerns, if any, associated with its use. It is the ceramic-glass-enamel coating as well as any loss of weight due
responsibility of the user of this standard to establish appro- to the dissolution of the substrate is measured by determining
priate safety and health practices and determine the applica- weight loss of the specimen after exposure to the hot alkali
bility of regulatory limitations prior to use. For specific hazard solution. A substrate without ceramic-glass enamel is tested to
statements, see Section 9. determine the expected weight loss due to dissolution of the
nondecorated side of the substrate.
2. Referenced Documents
5. Significance and Use
2.1 ASTM Standards:
C 162 Terminology of Glass and Glass Products 5.1 This test method is intended to be used when a quanti-
C 927 Test Method for Lead and Cadmium Extracted from tative measurement of the alkali durability of a ceramic-glass
the Lip and Rim Area of Glass Tumblers Externally enamel is needed. The test is applicable to glass coated with
Decorated with Ceramic Glass Enamels fired enamels where exposure to strong alkalis, or alkalis at
elevated temperatures might be encountered in service.
3. Terminology
5.2 This test method is intended to be an accelerated,
3.1 Definitions—For additional definitions of terms refer to destructive test. Results can be used as an indicator of the
Terminology C 162.
relative durability of a particular enamel.
3.1.1 ceramic glass enamels (also glass enamels or ceramic
6. Interferences
enamels)—predominantly colored, silicate-glass fluxes used to
decorate glassware. C 927 6.1 The extent to which an enamel has been fired to
3.1.2 maturity—of a fired ceramic glass enamel, a ceramic maturity, as well as the residual stresses remaining after
glass enamel has been fired to maturity when porosity of the annealing of test specimen, can influence results.
ceramic glass enamel has been substantially eliminated, and 6.2 Tests performed on tempered or heat-strengthened pro-
the expected surface gloss of the fired ceramic glass enamel has duction ware should be done by annealing the chosen sheet
been achieved. before cutting the specimen.
3.1.2.1 Discussion—Refer to GTA Engineering Standards
7. Apparatus
Manual, Section 4, D.3.3.1 and D.3.4.1, for testing criteria for
7.1 Balance or Scale, accurate to 0.1 g, to weigh reagents.
maturity.
7.2 Balance, accurate to 0.1 mg, to weigh specimens.
7.3 Waterbath, temperature controlled, capable of holding
This test method is under the jurisdiction of ASTM Committee C14 on Glass
95 6 3°C.
and Glass Products and is the direct responsibility of Subcommittee C14.10 on
7.4 Glass Marking Scribe.
Glass Decoration.
7.5 Beaker, stainless steel, 1200-mL, with no pouring lip, as
Current edition approved Nov. 15, 1991. Published January 1992. Originally
published as C 1203 – 91. Last previous edition C 1203 – 91.
shown in Fig. 1.
Annual Book of ASTM Standards, Vol 15.02.
7.6 Cover, stainless steel, for beaker.
GTA Engineering Standards Manual, Glass Tempering Association, Topeka,
7.7 Sample Holder, as shown in Fig. 1.
KS, 1992.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C 1203 – 91 (2002)
sized glass or sections of fired ware can also be used. The test
specimen should be small enough for accurate weighing to the
nearest 0.1 mg.
10.3 Bevel any sharp edges to avoid weight loss by chip-
ping.
10.4 Mark the sample with a glass marking scribe for
identification.
11. Procedure
11.1 Measure and record the length, width, and depth of
each specimen to the nearest 0.1 mm. Record the initial weight
of each specimen to the nearest 0.1 mg.
11.2 Place the specimens prepared as described in 10.1-
10.4, in a sample holder such as shown in Fig. 1 so that the
specimens are upright and separated from each other.
11.3 Prepare the alkali solution, as described in 8.1, in a
1200-mL stainless steel beaker with no pouring lip. This
volume of solution is adequate for testing a maximum of 250
cm of total specimen-decorated-surface area. A stainless steel
cover s
...