In the beginning of the use of tin oxide, it is mainly viewed as a SEM photomicrographs of some earlier Islamic glazed ceramics, of which the particles of tin oxide are concentrated at the interface, together with the existence of wollastonite, diopside and air bubble as other opacifiers.
42.
The firing temperature required for green frit may be slightly higher than that of blue frit, in the range of 950 to 1100�C . In certain circumstances ( the use of a two-step heating process, the presence of hematite ), scientists were able to make a cuprorivaite-based blue frit that later became a copper-wollastonite-based green frit at a temperature of 1050�C . On some ancient Egyptian wall paintings, pigments that were originally blue are now green : the blue frit can devitrify so that the copper wollastonite predominates over the lesser component of cuprorivaite . As with blue frit, Hatton, Shortland, and Tite have analyzed evidence for green frit at Amarna in the form of cakes, powders, and one vessel fragment and inferred the sequential production of the three types of artifacts.
43.
The firing temperature required for green frit may be slightly higher than that of blue frit, in the range of 950 to 1100�C . In certain circumstances ( the use of a two-step heating process, the presence of hematite ), scientists were able to make a cuprorivaite-based blue frit that later became a copper-wollastonite-based green frit at a temperature of 1050�C . On some ancient Egyptian wall paintings, pigments that were originally blue are now green : the blue frit can devitrify so that the copper wollastonite predominates over the lesser component of cuprorivaite . As with blue frit, Hatton, Shortland, and Tite have analyzed evidence for green frit at Amarna in the form of cakes, powders, and one vessel fragment and inferred the sequential production of the three types of artifacts.
