The cups were fired at 800C for a few minutes until the melting glass fused the wires in place. This first firing can be very nerve racking as the wires are only held in place by an adhesive that will burn out with the heat of the kiln. If the wires aren’t fixed by the melting glass they could become detached and fall off.
Once the initial firing has taken place and the wires are permanently fused to the cup. Applying further layers of colour glass is easier as the new application of glass won’t disturb the stable wires.
If any wires have fallen off, they can be replaced at this stage, silver and gold foils can be places strategically and other wire details can be added.