Scope:

The ASTM C676 test technique is designed to provide a convenient and standardized method for determining the detergent resistance of ceramic decorations on glass tableware. In addition, this test method is used to estimate the quality of glass enamel decorations that will be subjected to high phosphate detergents while in use. Before heavy metal testing, test method ASTM C676 aims to discover accelerated exposure to high phosphate detergents.

Test Procedure:

For ASTM C676, a test solution is prepared consisting of 5 % sodium pyrophosphate (Na P₂0. 10H₂O) and 95 % distilled water. The test specimen is then immersed in this test solution which is kept at 60°C ± 2°C. As an additional help to evaluate the degree of chemical activity on the specimen under test, a duplicate piece of ware (not exposed to the solution) is kept with the decoration under examination. After two hours, the specimen is removed from the solution, rubbed vigorously, dried, evaluated, and then classified into one of the following four categories :
• No loss of gloss.
• Gloss loss, no loss of opacity
• Noticeable loss of opacity.
• Complete removal of decoration.

Video 01: Ceramic tile and grout cleaning

Specimen Size : 

Representative glass tableware with ceramic decorations is used as an ASTM C676 test specimen. 

Data:

The specimen being tested and the decorating substances utilized in ASTM C676 are recognized, evaluated, and then classified under the four categories described above. After each 2-hour immersion period, the specimens should be graded into the classifications listed above.

Conclusion:

The ASTM C676 test technique is designed to provide a convenient and standardized method for determining the detergent resistance of ceramic decorations on glass tableware.