In order to study the loss of arsenic during prehistoric recycling activities, I started with the first casting experiments. A 5% arsenical bronze ingot with 250g was produced (see image on the right) and re-cast already several times. Graphite crucibles were used both for casting and as mould. The bronze was melted in a small furnace in reduced atmosphere and cast at 1110°C. Thus, As is lost only during the casting process itself and the cooling down of the alloy. Once cooled down, the crucible containing the bronze was placed in the oven at 1110°C and recast in another graphite crucible. The loss of arsenic was noted by white fume for about 1 min after the cast. In a few days I will have a look at the samples with the SEM-EDXS… looking forward to it!