The inside glaze is G2571A, outside is the bamboo version of the same recipe (with added Zircopax and rutile). Clay: Plainsman H443. Firing: Cone 10R. No wax was needed for application yet the two colors meet at the rim in a straight line (the outside was sprayed last). We used a gravity-feed sprayer, 100ml of glaze was applied on both the inside and outside.
In ceramic industry glazes are often sprayed, especially in sanitary ware. The technique is important.