Development of glazes from rocks, clay, and shells

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1992-03-28
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Abstract
Ceramic glazes are produced from a wide variety of common rocks and minerals. They are either made to provide aesthetically attractive and functionally protective coatings, to render the ware strong and impermeable to liquids and gases, or to provide readily cleanable surfaces. For some time now, the bulk of the essential ceramic glaze materials used in the country have been coming in the form of imported commodities. However, the present world economic order with its unfavourable effects on the economics of most developing countries such as Ghana makes prices of imported commodities, especially glaze materials, very high. This is a problem to the development of ceramics in the country. From observation, the availability of very useful local glaze materials which could account for over 70% of what we need calls for immediate attention. It is in view of the possibilities envisaged that investigations have been conducted into local rocks, clays and shells from the Winneba- Cape Coast Districts of the Central Region. ‘4he objective is to develop glazes using the bulk of these materials selected materials were formulated into possible glazes and fired to 1140°C, 1160°c, 1180°C and 1200°C. ,, The result of these investigations was the successful development of stoneware lazes between 1180°c and 1200°C, and mid-temperature earthenware glazes between 1140°c - 1160°C. These appear in varying shades of brown. The research begins with the problem and its setting in Chapter one; followed by the Review of the related literature in chapter two. The general procedures for the research are outlined in chapter three. Preliminary investigations and the main experimental procedures follow in the fourth and fifth chapters respectively. The bibliography, preceded by the general conclusions, summary of results and recommendations ends it all, with other relevant information appearing in the appendix.
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A thesis submitted to the Board of Postgraduate Studies, Kwame Nkrumah University of Science and Technology, Kumasi, in partial fulfilment of the requirement for the award of the Degree of Master of Arts in Art Education, 1992
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