Coloured glazes

Sanitary and also some domestic ware is manufactured from materials showing low water absorption (e.g. about 0.5%). Their composition is similar to that of porcelain and earthenware, but apart from feldspar or feldspar pegmatite, the mix also frequently contains other components serving as fluxes (limestone, dolomite, talc). The technology is essentially the same, the firing temperatures are 1250—1300 °C. Compared with porcelain, these materials lack translucency. Their surface is provided with white or coloured glazes. 

Coloured glazes contain colouring agents either dissolved in frit or ceramic colourants are added as heterogeneous insoluble ingredients to the mill. Ceramic colourants are mostly synthetic minerals and their mixtures. Glazes also make pos-... 

Copper Carbonate. The material is the basic carbonate, CuC03.Cu(0H)2 it is used as a source of copper for coloured glazes, particularly for those glazes fired under reducing condions. 

Spatterware. A type of mottled ceramic artware a white or coloured glaze is spattered irregularly over the dipped glaze before the glost firing. 

M Espin6s, J.P., and Carda, J.B. (2011) Synthesis, through pyrolysis of aerosols, of YIni (Mn,(03 blue pigments and their efficiency for colouring glazes. Dyes Pigm., 91, (3), 501-507. 

Cobalt forms both divalent and trivalent cations. Like iron, it forms oxide/ hydroxide phases in both oxidation states as well as mixed oxidation state phases. Cobalt(II) oxide is used extensively in the ceramics industry to produce blue-coloured glazes. Cobalt(II) hydroxide has two forms, pink and blue, with the former being more stable. It is used as a drying agent or as a catalyst in the manufacture of battery electrodes. 

Gold colour glaze for finish painting, T. Giichi and T. Kazuyoshi, JP 62105990, 1978. 

Aloe is an example of a yellow-coloured natural plant juice that was used as yellow pigment or glaze. The GALDI mass spectrum of Aloe hepatica, a historic sample from the... 

Wire and cable (US automotive, but not UK), adhesives, light-coloured window glazing strips (UK -30 °C to +55 °C). 

Tyndall scattering also causes the blinding effect of shining a car headlight directly into a thick bank of fog or mist it also yields the beautiful iridescent colours on the wing of a butterfly or peacock tail, and an opal and mother of pearl. A good potter can reproduce some of these optical effects with so-called iridescent glazes, which comprise colloidal materials. 

---