History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c15.s1.5

v1.c15.s1.5

This was, however, contested by Lucas who, on the basis of his own experiments, is of the opinion that the colour effect of the ceramic cannot be obtained merely by inverted firing (Lucas, pp 434-36). It is in fact due to the covering of that portion of the pot, which is to be done according to Lucas in two ways - viz. a) by the simultaneous production of the red of the body (apart from any wash of red colour) and the black of this interior and the rim or b) by producing ware wholly red first and then by a secondary operation blackening the interior and the rim.