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During the late 18th century Richard Champion, a Bristol merchant and potter, making Bristol porcelain, was working with a chemist, William Cookworthy. [1] Cookworthy began a search for good quality cobalt oxide to give the blue glaze decoration on the white porcelain and obtained exclusive import rights to all the cobalt oxide from the Royal Saxon Cobalt Works in Saxony. [2]
The blue decoration is painted onto the body of the porcelain before glazing, using very finely ground cobalt oxide mixed with water. After the decoration has been applied the pieces are glazed and fired. It is believed that underglaze blue and white porcelain was first made in the Tang dynasty.
Depression ware Pink sunflower patterned depression cake plate Green patterned Depression glass pieces. Depression glass is glassware made in the period 1929–1939, often clear or colored translucent machine-made glassware that was distributed free, or at low cost, in the United States and Canada around the time of the Great Depression.
Under the portico on the north façade are three tiled lunette panels and two roundels. The panels have white thuluth lettering reserved on a dark cobalt blue background. Between the letters are flowers in purple and turquoise. Within the mosque above the mihrab is a large lunette panel with tiles painted in cobalt blue, turquoise and dark ...
'Blue flowers/patterns') covers a wide range of white pottery and porcelain decorated under the glaze with a blue pigment, generally cobalt oxide. The decoration was commonly applied by hand, originally by brush painting, but nowadays by stencilling or by transfer-printing , though other methods of application have also been used.
Cobalt was used for blue glass. Copper and iron were used for green and for various shades of green, blue, and yellow. [70] Manganese was used to remove colors. [71] Although natural gas is the furnace fuel of choice for glassmaking today, the fuel mandated in Murano during the 13th century was alder and willow wood. [5]
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