How do you make old silver glaze?

To make old silver glaze, mix a base of clear or translucent glaze with a small amount of metallic silver pigment or luster. You can also add a bit of black or gray underglaze to achieve a weathered look. Adjust the proportions according to your desired effect, and test on a sample piece before applying it to your final work. Finally, fire the piece according to the glaze’s specific firing instructions to achieve the desired finish.