The body is buff burning Plainsman M340 (cone 6). The amber colored glaze is 80% Alberta Slip (raw:calcine mix) with 20% of each frit. The white engobe on the inside of mug 1 is L3954A (also glazed inside using transparent G2926B). These frits are producing an amber gloss glaze of high quality. On the outside of mug 1 we see it this glaze on the white slip until midway down, then on the bare buff clay. These mugs are fired using a drop-and-soak firing schedule.
Pages that reference this post in the Digitalfire Reference Database:
GA6-A - Alberta Slip Cone 6 Amber Base Glaze, L3954B - White Cone 6 Engobe for Plainsman M390, M340, GA6A Alberta Slip base using Frit 3124, 3249 and 3195 on dark body, P300 and M370 mugs with GA6A Alberta Slip (using Frit 3249), A Cone 6 white engobe works miracles on these dark and buff burning bodies
This post is one of thousands found in the Digitalfire Reference Database. Most are part of a timeline maintained by Tony Hansen. You can search that timeline on the home page of digitalfire.com.