I've attached a couple of pictures of a pot of w/w's that I had bought off ebay in ingots that needed to be cleaned (thanks for all the posts in another thread about cleaning your ingots before they go into the bullet pot). Anyway, there was an ingot or two that looked like it may have been linotype that I also included in the melt to clean up. I don't normally have linotype laying around so I thought that I'd just add it as it was only a pound and a half to about sixty pounds of w/w.
This is what the melt looked like after it was melted and attempted to flux. What is this stuff? Is it from the linotype? How do I flux it back into the melt? High temperature (~725˚F) seemed to make it worse amount wise but I still could get rid of the stuff at a lower temp.
Thanks guys!