Formulating a Cone 6 Matte Glaze

Matte glazes offer a sophisticated, tactile surface that contrasts beautifully with the gloss of a well-fired stoneware. However, getting the chemistry right requires understanding the balance between transparency and opacity.

The Role of Silica

• Silica is the primary glass former that creates the smooth surface of the glaze when melted.
• Using too much silica will result in a glossy surface rather than the desired matte finish.
• Adjusting the silica content allows you to control the texture and hardness of the dried glaze.

Selecting the Right Opacifier

• Titanium dioxide is a common opacifier that adds a milky white tone to the glaze.
• Zinc oxide can create a chalky, matte texture but requires careful application to avoid running.
• Iron oxide can be used to create subtle variations in the matte color without adding opacity.

Always test your glazes on a bisque-fired tile before applying them to your final work to ensure the chemistry works with your specific clay body.