this is for a very nice clear glaze that seems to work on many different clay bodies. source unknown but i always try to find out the origin of any recipe before i use it.
clear glaze cone 6
gertsley borate 21
neph sy 30
silica 325 31
Recipe you posted is exact match for "Wollastonite Clear" from a book I borrowed last year - not sure which one now* - credited to Bethany Krull; I see same recipe in a few other places...
Any road, I did choose the glaze as one of the four clears to try out.
I'm planning to keep it (pending the results of more testing), particularly for Aardvark SRF, as it clears the micro bubbles better (much better - no bubbles at all) than the other clears I'm trying. SRF has a high a