2 pages on ceramic glazing -
Glazes
        The noesis of ways to form glazes on pottery is dated back to at least 5000 B.C. Since glazes were do in many parts of the world long forwards the beginnings of any scientific knowledge of chemistry, it is clear that the processes involved mustiness stimulate been simple and the raw materials were abundant. The chemical make-up of glazes was non known to the ancient people in glazing their pottery. Their results were achieved by strictly experimental methods that had no basis in scientific knowledge or theory, but their results were in no way wanting(p) to the best of present-day glazes.
        The Egyptians, who undoubtedly made the first glassy ware, used the soda compounds that are found in teemingness in the desert areas of the Near East. The turquoise glazed beads, ornaments, and bitty sculptures, which are known as Egyptian bedcover, are plausibly the earliest glazed objects. The glaze on Egyptian paste is formed by mixing soluble sodium salts into the clay, which, during drying deposits on the surface where it forms a glaze when fired. Such glazes may have been made accidentally at first.
It is not unlikely that when objects were cosmos molded from the desert clays and talc, some of the soda ash that is so prevalent in the desert could have been mixed in by chance. The observation of this phenomenon, and the capitalization on it in whole shebang of art and utility, is a good example of the way in which man has advanced his techniques. It was discovered that the addition of copper-bearing minerals to the mixture resulted in bright blue and turquoise glazes. The vibrant color of this fictional character of glaze is irresistibly beautiful, yet technically there is no great difficulty in producing it from a few...
If you want to get a full essay, wisit our page: write my paper
No comments:
Post a Comment