Limestone is quarried at Buxton, Millersdale and Matlock for lime, fluxing and chemical purposes. [Please select]
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_--In order to assist in removing the scale and other impurities and to make the welding surfaces as clean as possible while being joined, various fluxing materials are used as in other methods of welding. [Please select]
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Various prepared fluxing powders are on the market for this work, practically all of them producing satisfactory results. [Please select]
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Calcined borax may also be mixed with about 15 per cent of sal ammoniac to make a satisfactory fluxing powder. [Please select]
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