Cone 7
VESUCG
Vesuvius Crystalline Glaze
Crystalline·Oxidation
Recipe
Ferro Frit 3110
50
Zinc Oxide
25
Silica
18
Whiting
5
Magnesium Carbonate
2
Total100
Notes
From Crystal Glazes Book 1 by Fara Shimbo, page 146. Best at cones 8 or 9 but will work at 7. Crystal number: Plentiful on tiles or vessels. Rate Of Growth: .5 cm diameter per hour. Crystal Color: Very white, opaque. Crystal Shape: "Mountainous" on a vessel(shown in photo); can vary widely on a tile. Ground Color: Colorless transparent on both tiles and vessels. Crazing: not too bad. Color Response: Works well with all colors. Copper comes out a sea or mint green, close to a true aquamarine. Nickel works great. Seeding properties: Excellent with zincite. Also seeds quite nicely with very small pieces of hemimorphite, producing a somewhat more acicular crystal.
Description
Cone 7-9 - Titanium-free with whiting, magnesium carbonate