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  2. Underglaze - Wikipedia

    en.wikipedia.org/wiki/Underglaze

    The vibrancy that only underglaze was able to supply is now achievable with a variety of over-glazes therefore discounting the advantage that underglaze commercial production had. A well-known New York underglaze tile and pottery decorator of the 1940s, Carol Janeway (1913-1989), was diagnosed with lead poisoning after eight years of using a ...

  3. Porcelain - Wikipedia

    en.wikipedia.org/wiki/Porcelain

    Hard-paste porcelain was invented in China, and it was also used in Japanese porcelain.Most of the finest quality porcelain wares are made of this material. The earliest European porcelains were produced at the Meissen factory in the early 18th century; they were formed from a paste composed of kaolin and alabaster and fired at temperatures up to 1,400 °C (2,552 °F) in a wood-fired kiln ...

  4. Ceramic flux - Wikipedia

    en.wikipedia.org/wiki/Ceramic_flux

    In clay bodies a flux creates a limited and controlled amount of glass, which works to cement crystalline phases together. Fluxes play a key role in the vitrification of clay bodies by lowering the overall melting point. The most common fluxes used in clay bodies are potassium oxide and sodium oxide which are found in feldspars.

  5. Ceramic glaze - Wikipedia

    en.wikipedia.org/wiki/Ceramic_glaze

    Glazes need to include a ceramic flux which functions by promoting partial liquefaction in the clay bodies and the other glaze materials. Fluxes lower the high melting point of the glass forms silica, and sometimes boron trioxide. Raw materials for ceramic glazes generally include silica, which will be the main glass former.

  6. Iznik pottery - Wikipedia

    en.wikipedia.org/wiki/Iznik_pottery

    Most of the tiles were decorated with coloured glazes using the cuerda seca (dry cord) technique, but in a few cases the tiles were underglaze painted in cobalt blue and turquoise. The cuerda seca technique created a new way to glaze these tiles while not requiring the intense labor previous techniques had. [ 16 ]

  7. Tin-glazing - Wikipedia

    en.wikipedia.org/wiki/Tin-glazing

    Though the recipe of tin glazes may differ in different sites and periods, the process of the production of tin glazes is similar. Generally speaking, the first step of the production of tin glazes is to mix tin and lead in order to form oxides, which was then added to a glaze matrix (alkali-silicate glaze, for example) and heated. [19]

  8. Overglaze decoration - Wikipedia

    en.wikipedia.org/wiki/Overglaze_decoration

    In such cases the first firing for the body, underglaze decoration and glaze is followed by the second firing after the overglaze enamels have been applied. The technique essentially uses powdered glass mixed with coloured pigments, and is the application of vitreous enamel to pottery; enamelled glass is very similar but on glass. Both these ...

  9. Ball clay - Wikipedia

    en.wikipedia.org/wiki/Ball_clay

    More recent trade began when a clay was needed to make tobacco pipes in the 16th and 17th century. [8] In 1771 Josiah Wedgwood signed a contract for 1,400 tons a year of ball clay with Thomas Hyde of Purbeck , enabling the production of thinner-walled ceramics.