Leslie Parrott
Methods:

7742 Porcelain vase with copper red glaze

The pots are reduction-fired to cone 12, about 1300C, in a propane fuelled kiln. They are positioned in the kiln to exploit glaze variations arising from the expected patterns of temperature and oxygen level. The firing conditions are monitored using cones, thermocouples and an oxygen sensor. The compositions of the glazes and clays and the glaze thickness are varied to yield a wide range of colours and surfaces. Glazes are made with a range of fluxes and oxides such as iron, copper, chromium or titanium. Porcelains and stonewares are used, often in blends, to complement the glaze.

Understanding what affects the appearance of a pot is helped by number-stamping and photographing each pot. The photographs are linked to a database, detailing the glaze, the clay body, the position of each pot in the kiln and the firing conditions. This approach is invaluable in digesting and recalling the results from around 20 glazes and 10 clay bodies. It also helps to uncover trends that are sources of ideas for subsequent pots and tests.