Thanks Audra, I'll make up a test batch of the SU Standing Bear glaze today. Like Jeff Zamek's black lab, my husband was very fond of wearing black so I'll add 12% 6600 Mason stain. It has been an unpleasantly busy 6 weeks since my husband passed with little time for clay. I have managed to throw and bisque fire about 30 mugs, and the future looks clearer, so I'll test fire the three glazes I have decided to try very soon even tho my kiln will be largely empty. Not ecologically sound, but none of my friends have stuff to add to the load. Unless the results are totally embarrassing I'll post pictures, Joan Klotz.