Round button with 2 holes, bicolor, made of Galalith. On an ecru background, there are two slightly raised, colored layers. Five colors are available. The button measures 18 mm in diameter. The back of the button is smooth. What is Galalith? It is a semi-synthetic plastic called milk stone because it is made from cow's milk casein. This thermosetting material was developed at the end of the 19th century. It is a very time-consuming material to produce but very easy to work with in engraving and dyeing, among other things. That's why it has been widely used in button making. These buttons wash very well, provided they are not left to soak in water for several hours. Round button with 2 holes Material: Galalith Size: 18 mm Made in France