On the right is what it will look like when fired with a clear glaze on the inside and amber-clear on the outside. On the left it has dried and is ready for a little fix-up before bisque firing.
Engobes are high-clay slurries that are applied to leather hard or dry ceramics and fire opaque. They are used for functional or decorative purposes.
L3954B - White Cone 6 Engobe for Plainsman M390, M340