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In 1983 an expansion project in the area of its calcium carbonate facilities was conducted.
The expansion involved the installation of additional grinding capacity and new mill facilities and increased production.
Calcium carbonate, long used as the coating of paper, was now being used as an important filler as the paper industry converted from acid-based paper making systems to alkaline systems.
In 1988 English China Clays ( ECC ) International purchased Moretti Harrah and in 1989 ECC purchased Cyprus Thompson Weinman.
Then, Georgia Marble Company purchased Cyprus Thompson Weinman.

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