Glaze Research

Digital Fire has a lot of free links that hold a wealth of information. You can find chemical data on nearly all individual materials, as well as a number of formulated glaze recipes. What I've been working on the last week is trying to figure out proper formulations for durable matte glazes in both Cone 1 and Cone 6. I have found a myriad of recipes for high gerstley borate matte glazes. Which I know from first hand experience from testing in college that these glazes are not durable and they leach. So I'm trying to come up with a formula made from the materials I have on hand that make a matte glaze. The good news is I've found shiny base glazes for both the cone 1 and the cone 6. I've also found some proven cone 1 and cone 6 macro crystalline glazes. I have a lot of testing to do now that I've done some research. However for anyone who might be interested in these types of glazes here are some links to digital fire that might help.

http://digitalfire.us/4sight/education/g1214w_cone_6_transparent_base_glaze_121.html

http://digitalfire.us/4sight/education/g1214z_cone_6_matte_base_glaze_122.html

http://digitalfire.us/4sight/education/formulating_ash_and_native-material_glazes_188.html

All three of these links are great. The last one is of particular interest because I have an ash deposit that contains a known material cataloged by a geologist with the USGS.