Re Fall's Creek Shino(ish)
I have had no problems with drying and cracking, and I do not prefire any of the Alberta slip. The only other slip I have tried is Albany and had no problems there, but it is so precious that I switched to Alberta. I have tried several clays but the closest I have come to porcelain is Laguna''s cone 5 B mix - worked fine. Overall I think that of the colors (Mason stains and oxides) I have tried I prefer the glazes when they are on clays containing some iron - but that's probably just personal preference. It seems to me that brown clays accentuate the shino(ish) quality.