TS 15771 Glassy and Porcelain Enamels - Determination of Surface Scratch Hardness According to Mohs Scale

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of TS 15771 test. TS 15771 is a technical standard that summarizes the method of determining the surface scratch hardness of vitreous and porcelain enamels according to the Mohs scale. The Mohs scale is a qualitative measure of the scratch resistance of minerals, ranging from 1 (softest) to 10 (hardest).

The scratch hardness test involves scratching the enamel surface with a set of standardized mineral points, starting from the softest (talc) to the hardest (diamond). The hardness of enamel is determined by the highest number on the Mohs scale that does not scratch the surface.

The steps involved in performing the surface scratch hardness test according to TS 15771 are as follows:

• Prepare the test surface: The enamel surface to be tested must be thoroughly cleaned and dried.
• Mineral selection: The minerals to be used in the scratch test should be selected according to the Mohs scale, which starts with talc (Mohs hardness 1) and progresses to diamond (Mohs hardness 10).
• Perform the scratch test: Start with the softest mineral (talc) and try to scratch the enamel surface with the tip of the mineral. If enamel is scratched, move on to the next harder mineral until a mineral that does not scratch the surface is found. The hardness of enamel is equal to the highest number on the Mohs scale that does not scratch the surface.

It is important to note that this test provides a qualitative measure of scratch resistance and not a quantitative measure of hardness. Test results can be affected by factors such as the angle and pressure of the mineral spot, the condition of the enamel surface, and the variability of minerals. Therefore, it is recommended to follow the test procedure carefully and repeat the test multiple times to ensure its accuracy.

EUROLAB assists manufacturers with TS 15771 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.