Craps dice are typically made out of a type of plastic called cellulose acetate, which is a hard, clear, and durable material. Cellulose acetate is often used to make a variety of products, including dice, eyeglass frames, and playing cards.
The dots on the craps dice are usually painted with a type of paint called enamel, which is a glossy and durable paint that is resistant to wear and tear. Enamel paint is applied to the dice in a thin layer and is allowed to dry before the dice are used.
The process of making craps dice begins with the creation of a mold, which is a negative replica of the dice. The mold is made from a material that can withstand high temperatures, such as aluminum or steel. Once the mold is created, it is filled with a liquid cellulose acetate mixture, which is then heated to a high temperature until it hardens and takes the shape of the mold.
After the dice are formed and cooled, they are inspected for any defects or imperfections. The dots are then painted onto the dice using the enamel paint, and the dice are allowed to dry before they are packaged and shipped to casinos and other retailers.