Showcased here are two hardcopy parts for Batman's nemsis, The Penguin. The torso is the second best piece to have in my mind, the best being the head. You'll notice the coat tails are present as well.
Here is a side shot of the torso. Kenner employed metal dowels to hold their hardcopies together. This view gives a nice view of the holes for the dowels. The pieces are cast in a green urethane, commonly referred to as "dynacast". This material was prominently used for hardcopies during the mid-80's.
Hardcopies are produced using a silicon mold (this mold is created from the orginal wax figure sculpting). Once the hardcopy is removed from the mold it may serve a number of purposes. It might remain unpainted and ultimately used to create the steel tooling for the figures. Extra hardcopies are poured as a precaution, should something happen to the tooling master. These extras would remain unpainted as well. If a hardcopy is not destined for tooling or backup, then it will more than likely be handpainted for use in catalog photography, trade shows, or as a paintmaster.