Painting on glass and porcelain, and enamel painting : a complete introduction to the preparation of all the colours and fluxes used for painting on glass, porcelain, enamel, faience and stoneware ... (1897)
Hermann, Felix · London : Scott, Greenwood · leaf 260
explanation of this circumstance.When glass is maintained in a fused condition at a constanttemperature for some time, the small particles of the sub-stance in the soft state alter their mutual position, and, byreason of their power of aggregation, assume a crystallinestructure, whereby the glass… … FiG. 7. ture ; on the contrary, it is made still worse, most of thecolours undergoing alteration. In the present operation also, the temperature is de-termined by watching the glowing ware through the hole inthe muffle, and, according to the colour of the various degreesof heat observed, viz.,…
Glass painting and staining · Enamel and enameling · Porcelain
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