B-Mix 5 (WC401)
Not a true porcelain, but it's smooth porcelain texture is a pleasure to throw and form, and it fires to a cream color in oxidation.
Red Calico (WC881)
A good general purpose clay that works well for all forming methods. It is a little darker than buffalo wallow.
B-3 Brown (WC391)
A pliable clay with smooth grog and color from manganese and iron. Fires almost black when reduced and dark brown/black in oxidation.