Super White Raku Glaze
80.00 Frit 3134 (or P-54)
8.00 Custer Feldspar
Add: 5.00 - 8.00 Zircopax
The crackle pattern depends on your clay body and the glaze thickness so you should:
Do a line blend with the zircopax to get it more white and change the crackle pattern. Also thick application is large crackle and thin is fine crackle. You can also add lithium carbonate to make it larger crackle.