Left: M390. Right: Coffee. The glaze is GA6-A Alberta Slip amber base. The top halves have L3954B white engobe under the glaze. To read all about it on the Coffee Clay data sheet click here. Its working properties are like M340. Glazes that work on M340 should work on this (e.g. G2926B clear, Alberta Slip and Ravenscrag Slip glazes). Colorants in the body will bleed into glazes, making them appear completely different than they would on lighter burning bodies. Rutile glazes will come alive! Most transparent glazes will bubble-cloud, use GA6-A if possible (see the data sheet for more information).