ASTM C724-91(2015)
(Test Method)Standard Test Method for Acid Resistance of Ceramic Decorations on Architectural-Type Glass
Standard Test Method for Acid Resistance of Ceramic Decorations on Architectural-Type Glass
SIGNIFICANCE AND USE
4.1 This test method evaluates the quality and serviceability of a ceramic decoration on architectural type glass. The degree of attack is determined using an acidic solution both quantitatively and qualitatively.
4.2 This test method provides a convenient control test during the manufacture of the ware.
4.3 This test method is suitable for specification acceptance.
SCOPE
1.1 This test method covers qualitative determination of the acid resistance of the ceramic decoration on architectural glass.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: C724 − 91 (Reapproved 2015)
Standard Test Method for
Acid Resistance of Ceramic Decorations on Architectural-
Type Glass
This standard is issued under the fixed designation C724; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope all reagents shall conform to the specifications of the Commit-
tee onAnalytical Reagents of theAmerican Chemical Society,
1.1 This test method covers qualitative determination of the
where such specifications are available. Other grades may be
acid resistance of the ceramic decoration on architectural glass.
used, provided it is first ascertained that the reagent is of
1.2 The values stated in SI units are to be regarded as
sufficiently high purity to permit its use without lessening the
standard. No other units of measurement are included in this
accuracy of the determination.
standard.
5.2 Citric Acid Solution (1+9)—Add 10 parts by mass of
1.3 This standard does not purport to address all of the
reagent grade citric acid to 90 parts by mass of distilled water.
safety concerns, if any, associated with its use. It is the
Prepare fresh for each determination.
responsibility of the user of this standard to establish appro-
5.3 Hydrochloric Acid Solution (1 + 9)—Add 10 parts by
priate safety and health practices and determine the applica-
mass of reagent grade concentrated hydrochloric acid (HCl)
bility of regulatory limitations prior to use.
(36 to 38 %) to 90 parts by mass of distilled water.
2. Terminology
6. Procedure
2.1 Definitions:
2.1.1 architectural glass—glass used in the building indus-
6.1 Place four drops of each acid solution on a separate
try.
location on the surface of the ceramic decoration of the
architectural glass to be tested. Cover each spot with a
3. Summary of Test Method
watchglass to retard evaporation and prevent contamination.
3.1 This test method qualitatively determines, by visual
Acid should remain on the surface of the test specimen for 15
inspection, the degree of attack upon a ceramic decoration by min at 20 62°C.
a 10 % citric acid solution and a nominal 3.7 % hydrochloric
6.2 After 15 min of exposure, wash the acid solutions
acid solution.
(1 + 9) from the test specimen with tap water and allow it to air
dry.
4. Significance and Use
4.1 This test method evaluates the quality and serviceability
7. Report
of a ceramic decoration on architectural type glass. The degree
7.1 Report the following information:
of attack is determined using an acidic solution both quantita-
7.1.1 The degree of attack by visual observation by grading
tively and qualitatively.
as follows:
4.2 This test method provides a convenient control test
Grade 1—No attack apparent
during the manufacture of the ware.
Grade 2—Appearance of iridescence or visible stain on the
4.3 This test method is suitable for specification acceptance. exposed surface when viewed at a 45° angle but not apparent
at angles less than 30°
5. Reagent
Grade 3—A definite stain which does not blur reflected
5.1 Purity of Reagents— Reagent grade chemicals shall be images and is v
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C724 − 91 (Reapproved 2010) C724 − 91 (Reapproved 2015)
Standard Test Method for
Acid Resistance of Ceramic Decorations on Architectural-
Type Glass
This standard is issued under the fixed designation C724; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers qualitative determination of the acid resistance of the ceramic decoration on architectural glass.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Terminology
2.1 Definitions:
2.1.1 architectural glass—glass used in the building industry.
3. Summary of Test Method
3.1 This test method qualitatively determines, by visual inspection, the degree of attack upon a ceramic decoration by a 10 %
citric acid solution and a nominal 3.7 % hydrochloric acid solution.
4. Significance and Use
4.1 This test method evaluates the quality and serviceability of a ceramic decoration on architectural type glass. The degree of
attack is determined using an acidic solution both quantitatively and qualitatively.
4.2 This test method provides a convenient control test during the manufacture of the ware.
4.3 This test method is suitable for specification acceptance.
5. Reagent
5.1 Purity of Reagents— Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all
reagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, where
such specifications are available. Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high
purity to permit its use without lessening the accuracy of the determination.
5.2 Citric Acid Solution (1 + 9)—Add 10 parts by mass of reagent grade citric acid to 90 parts by mass of distilled water. Prepare
fresh for each determination.
5.3 Hydrochloric Acid Solution (1 + 9)—Add 10 parts by mass of reagent grade concentrated hydrochloric acid (HCl) (36 to
38 %) to 90 parts by mass of distilled water.
6. Procedure
6.1 Place four drops of each acid solution on a separate location on the surface of the ceramic decoration of the architectural
glass to be tested. Cover each spot with a watchglass to retard evaporation and prevent contamination. Acid should remain on the
surface of the test specimen for 15 min at 20 62°C.
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 Glass
Decoration.
Current edition approved March 1, 2010May 1, 2015. Published March 2010May 2015. Originally approved in 1974. Last previous edition a
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