We have recently started experimenting with the new bronze clay and feel rather excited about the first results. After some unexpected outcomes and a few tests and adjustments with regards to temperature ramp and hold times we are close to finding the best way to fire this wonderful new clay. It differs very much from silver clay both in handling, shaping, not to mention firing. It appears harder when out of the packet and dries more quickly, requiring fast shaping to avoid unsightly cracks. Firing takes a very long time and whilst the instructions given by the manufacturer seem to work for most people, they don't necessarily work for every single kiln as every machine is different.
For thick pieces we have found that the slow 250F/121C per hour to 1550F/843C ramp was definitely needed but we reduced the hold time by approximately 1 hour to avoid over firing. We are still testing this procedure as total firing time seems to vary depending on how many pieces are fired together, on what pan is used (tall or short), on where the pieces are positioned in the pan and on whether they are fired in layers or not, in fact the top layers give different results compared to the bottom ones.
The pendants portrayed in the photographs were fired in coconut shell based carbon which have them a lovely light patina. The Cross and Fatma Hand came out a bright gold colour whilst the square pendant with red CZ got more of a bronzy/terracotta shade. The Pearl Heart took a slight hint of green instead.
We will update you on our trials and tests and look forward to eventually being able to sell some of these creations in our online store.
