Among Trubner's many accessions are a Yuan dynasty Dish with Phoenix and Flower Motifs (c 1300), classic Jingdezhen porcelain with dense cobalt underglaze decoration
Obtained copper (II) chloride is used as a colorant of underglaze decoration.
Nowadays, copper (II) oxide and copper carbonate compounds are usually used for underglaze decoration.
TOBY jugs fall into three groups: Jugs with drab Whieldon-type coloured glazes in a limited palette, which are the most sought-after; jugs with underglaze decoration
in the Prattware colours of creamware and pearlware; and jugs with enamels applied over a clear glaze (including jugs by Ralph and Enoch Wood).
A founder of the Women's Pottery Club in Cincinnati, Mary Louise McLaughlin, moved to the new pottery in 1879 which took the Longworth's family home of Rookwood, and developed a new style of underglaze decoration
by adapting Chaplet's Barbotine technique from France, using coloured slips.
The pigments obtained are used as in-glaze colourants in stoneware glazes and as underglaze decoration components on white earthenware bodies.
Besides using STD-P1, P1FA, STD-P4 and P4FA coded pigments in stoneware glazes, they were also used for underglaze decoration.
The handbuilt teapot-centered tableaux of the 1980s are much tighter, with impeccably controlled geometric designs, the result of carefully taped zones of underglaze decoration
that echo the angularity of their forms.