The appearance of the partially dry slabs is unattractive, but that does not signify if the quality of the vulcanised product satisfies requirements. [Please select]
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All vulcanised rubber goods, whatever the process, have a limited life or period during which they can be relied on to give useful service. [Please select]
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Thus the vulcanised rubber retains the form in which it was originally shaped. [Please select]
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But even the best grades give a vulcanised product which rapidly deteriorates if the vulcanisation is carried too far. [Please select]
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The thick sheet is then roughly cut to shape and vulcanised in a mould by heating in steam under pressure. [Please select]
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From the vulcanised sheet so obtained the rings for testing are cut (45 mm.) [Please select]
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The moulds are vulcanised in an oil bath, or oven of some description, in which a constant temperature is maintained. [Please select]
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Thus, two samples vulcanised satisfactorily when mixed with sulphur only, but one of them gave unsatisfactory results in the presence of litharge. [Please select]
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It has long been recognised that mineral ingredients may modify the product when vulcanised, but the modification is not necessarily uniform. [Please select]
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The latter was gradually absorbed and "dissolved" in the rubber, and the heat of the bath caused the dissolved sulphur to combine with the rubber to produce vulcanised rubber. [Please select]
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For other purposes the rubber is swollen in a solvent, such as coal-tar naphtha, and subsequently masticated; the soft dough is then shaped or spread on cloth, and vulcanised after allowing the solvent to evaporate. [Please select]
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