Good day
I've recently inquarted two batches of metal and recovered a very dark "coffee roast" coloured sponge. Quick scan with XRF indicated about 99.2% purity, although this was just done to get an indication of purity. Upon melting, however, the sponge took very long to melt and I struggled to pour/cast it into an ingot. I did not take the sponge into AR after the inquartation, only rinsed with hot water a good couple of times and dried before melting.
Any explanations as to why the melt would struggle?
I've recently inquarted two batches of metal and recovered a very dark "coffee roast" coloured sponge. Quick scan with XRF indicated about 99.2% purity, although this was just done to get an indication of purity. Upon melting, however, the sponge took very long to melt and I struggled to pour/cast it into an ingot. I did not take the sponge into AR after the inquartation, only rinsed with hot water a good couple of times and dried before melting.
Any explanations as to why the melt would struggle?