Slipware Posset Pot by Edward Fishley of Fremington 1843   

The characteristic North Devon SGRAFFITO style is achieved by dipping the red earthenware pot into a watery mixture of white clay, called SLIP. When the mixture has formed a thin skin on the surface of the pot, designs can be scratched through, revealing the earthenware below. The pot is then fired and glazed to create the finished product.