Which of the animal product is used in the production of buttons?

The animal product that is used in the production of buttons is bone. Bone buttons are made from the bones of various animals, including cows, deer, and buffalo. The process involves cutting the bones into thin slices, drilling holes in the center of each slice, and then polishing them to create a smooth surface. The resulting buttons are durable, lightweight, and have a unique pattern that varies depending on the type of bone used. In the past, bone was a popular material for making buttons because it was readily available and easy to work with. Today, bone buttons are still used in some traditional clothing and accessories, but they have largely been replaced by plastic and other synthetic materials due to cost and environmental concerns. In summary, bone is the animal product that is used in the production of buttons, which are made by cutting and polishing thin slices of bone from various animals.