This is not a substitute. It is the original Barnard (a.k.a Blackbird) slip clay. Supplies are limited as it is no longer being mined. Glazes calling for Barnard are typically brown or black owing to the concentration of iron and manganese oxides.
This is not a substitute. It is the original Barnard (a.k.a Blackbird) slip clay. Supplies are limited as it is no longer being mined. Glazes calling for Barnard are typically brown or black owing to the concentration of iron and manganese oxides.