Cone 6: Gray Matte is formulated to produce a smooth matte surface. Light coats will allow clay body characteristics to appear through the glaze (especially on dark and speckled clay bodies).
Cone 10: Color changes to a blue/gray.
TIP: A true matte finish at cone 5/6 with no movement. Thicker application, three or more coats, will produce a more opaque finish.
Stoneware matte glazes range from solid shades to those that create interesting color variations as they move and break. Application thinkness is the key to making mattes work for you.