For me its not what's on the surface but what is the porosity level inside the casting. I need to rough cast copper for machining it into parts later. I don't want any bubbles in the casting. It would be great if you would cut some ingots in half so we could really see what's going on inside. Thanks
Thoroughly enjoy your experiments. As such, the results are always interesting and worthy as 'art'. I have a lot of casting 'texture' experiments planned, and hope to do many 'soon'.
Melted, It took me four tries over several months, but I finally made a working aluminum ingot mold out of cast aluminum. I wanted to say thank you for the inspiration from your video all those months (has it been a year?) ago.