Re: My First Prop. Xavier's School Plaque.
The test cast was made of just plain old black polyurethane resin.
The cold cast bronze pieces have a bronze powdercoat on the face, then backfilled with mixture of bronze powder, resin, porcelain frit, and alabaster.
I'm guessing in the neighborhood of 6 to 7 lbs. Maybe more depending on how much bronze powder I toss into the mix. I wanted the castings to be substantial.
My client only wanted 5, plus the full bronze.