Published in "Low-Fire Sculpture Glazes" by Holly Goring, in the December 2016 issue of Ceramics Monthly.
J.P.'s Dry is a low-fire base glaze for sculpture that holds colorants well. For Patina Green, add: 0.25% Copper Carbonate. For Soft Yellow, add: 6.0% Red Iron Oxide. For Black, add: 6.0% Manganese Carbonate and 7.0% Nickel Oxide. The glaze variation on the test tile shown here is Patina Green.
This glaze is not food safe.