Coating of pharmaceutical tablets: the spray-pan method

Abstract
A new method of coating tablets uses the revolving coating pan, but the coating materials are applied in solution or suspension, as a spray from a centrifugal disc atomiser. Addition of coating materials is uniform, controlled, and at a rate which allows even deposition on the tablet. Dry powders need not be used and the process is therefore dust-free. The products of the method compare favourably with tablets coated commercially and with tablets coated by the standard method in laboratory size (16 inch) pans when assessed by uniformity of weight tests, roundness measurement, and radiographic examination.

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