The pots are made in a decorative technique called Sgraffito, which means that they have an incised decoration scratched through a lighter coloured slip (clay suspension), which was applied to the surface before the pots were fired. The lines of the incision stand out in the darker colour of the underlying clay. Further decoration and colour was provided by casual brush strokes of green (copper oxide) and orange brown (iron oxide) pigment. Finally a lead glaze was applied, which gave the pots a glossy surface after firing.