Does anyone know the approximate composition of WW's? I suppose I could check mass and volume for density, but I'm thinking it's probably not that critical. I'm going to see if I can find a source of Lineotype.

2.5 to 4% Antimony, .25 to .50% tin-- the balance lead.

Trace amount of arsenic which is needed for heat treating. Trace amounts of many other metals/substances.