
Rough modelled
Runs of honey-green glaze with chamotte showing through.
A glazed ceramic relief is relief plus glaze: firing changes both the colour and the surface, so the sketch has to show not only the form but how the glaze behaves — where it runs, where it pools in the hollows, where it leaves the body bare. The four styles here are rough modelling with runs, flat majolica, a single monochrome glaze and reduction-fired lustre.

Runs of honey-green glaze with chamotte showing through.

Low relief outline with a flat, dense glaze fill.

A single glaze: dark in the hollows, pale on the ridges.

Iridescent metallic lustre, clouded by the reduction firing.
Glaze runs off the ridges and pools in the recesses: the layer is thicker there and the colour deeper. On the ridges it is thin and pale — and that difference is what draws the relief in the monochrome styles.
Reduction firing is done with a shortage of oxygen: metal oxides in the glaze are reduced to a metallic film and the surface starts to shimmer. That is where the clouding and metallic sheen of lustreware come from.
Majolica is painting on an opaque white tin glaze: the relief is minimal and the work is done by flat areas of colour inside the outline.