rubber. compacted rubber to be specific.
pure sythetic rubber. mostley made in checkslovkia
Generally a very tough rubber.
They are made from rubber but on the sides they have made bumbs so it can move across the ground easy, hope that helps.
Special hardened rubber.
vulcanized rubber
Originally a ball or piece of wood was used. But in the early 1900s, pucks were made of two pieces of old tire rubber glued together. But this puck was very unreliable. So in 1940, Art Ross designed...