Each enamel pin requires of a unique metal die. The backing is die-struck like a coin, and then the recesses of the design are filled with colored enamel. Finally the pin is baked in a kiln for durability and polished to protect the lustrous jewelry-like finish.
1″ x 1″ Enamel lapel pin from ShinyBadges.com.
Red = Communist/Socialist
Black = Anarchist/Voluntaryist/Pirate