ASTM C1203-04

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Designation:C1203–04
Standard Test Method for
Quantitative Determination of Alkali Resistance of a
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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 3.1.2.1 Discussion—Refer to GTA Engineering Standards
Manual, Section 4, D.3.3.1 and D.3.4.1, for testing criteria for
1.1 This test method covers the determination of the resis-
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maturity.
tance of a fired ceramic-glass enamel to a 10 % alkali solution
held near its boiling point for 2 h.
4. Summary of Test Method
1.2 This test method is not applicable to large tempered
4.1 This test method measures the weight loss of a glass
glass sheets or specimens larger than 9 by 9 cm.
specimen decorated with a fired ceramic-glass enamel, when
1.3 This standard does not purport to address all of the
completely immersed in a 10 % alkali solution near its boiling
safety concerns, if any, associated with its use. It is the
point. A stainless steel beaker containing test samples and a
responsibility of the user of this standard to establish appro-
10 % alkali solution is heated at 95°C in a temperature
priate safety and health practices and determine the applica-
controlled water bath for 2 h. Chemical dissolution of the
bility of regulatory limitations prior to use. For specific hazard
ceramic-glass-enamelcoatingaswellasanylossofweightdue
statements, see Section 9.
to the dissolution of the substrate is measured by determining
2. Referenced Documents weight loss of the specimen after exposure to the hot alkali
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solution.Asubstrate without ceramic-glass enamel is tested to
2.1 ASTM Standards:
determine the expected weight loss due to dissolution of the
C 162 Terminology of Glass and Glass Products
nondecorated side of the substrate.
C 927 Test Method for Lead and Cadmium Extracted from
the Lip and Rim Area of Glass Tumblers Externally
5. Significance and Use
Decorated with Ceramic Glass Enamels
5.1 This test method is intended to be used when a quanti-
E 691 Practice for Conducting an Interlaboratory Study to
tative measurement of the alkali durability of a ceramic-glass
Determine the Precision of a Test Method
enamel is needed. The test is applicable to glass coated with
3. Terminology fired enamels where exposure to strong alkalis, or alkalis at
elevated temperatures might be encountered in service.
3.1 Definitions—For additional definitions of terms refer to
5.2 This test method is intended to be an accelerated,
Terminology C 162.
destructive test. Results can be used as an indicator of the
3.1.1 ceramic glass enamels (also glass enamels or ceramic
relative durability of a particular enamel.
enamels)—predominantly colored, silicate-glass fluxes used to
decorate glassware. C 927
6. Interferences
3.1.2 maturity—of a fired ceramic glass enamel, a ceramic
6.1 The extent to which an enamel has been fired to
glass enamel has been fired to maturity when porosity of the
maturity, as well as the residual stresses remaining after
ceramic glass enamel has been substantially eliminated, and
annealing of test specimen, can influence results.
theexpectedsurfaceglossofthefiredceramicglassenamelhas
6.2 Tests performed on tempered or heat-strengthened pro-
been achieved.
duction ware should be done by annealing the chosen sheet
before cutting the specimen.
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This test method is under the jurisdiction of ASTM Committee C14 on Glass
and Glass Products and is the direct responsibility of Subcommittee C14.10 on
7. Apparatus
Glass Decoration.
Current edition approved April 1, 2004. Published May 2004. Originally
7.1 Balance or Scale, accurate to 0.1 g, to weigh reagents.
approved in 1991. Last previous edition approved in 2002 as C 1203 – 91 (2002).
7.2 Balance, accurate to 0.1 mg, to weigh specimens.
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Annual Book of ASTM Standards, Vol 15.02.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on GTA Engineering Standards Manual, Glass Tempering Association, Topeka,
the ASTM website. KS, 1992.
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C1203–04
7.3 Waterbath, temperature controlled, capable of holding could cause chipping or cracking during the test. Test a
95 6 3°C. nondecorated specimen representative of the decorated sub-
7.4 Glass Marking Scribe. strate along with the decorated specimens as a control.
...