When was plastic invented?

It is said that the origin of plastic is the discovery of vinyl chloride and vinyl chloride powder by French scientist Regnault in 1835, about 170 years ago. The first commercialized plastic is celluloid, which was developed in the United States in 1869. At that time billiard balls were made of ivory, which was expensive. Companies in billiards business collected alternative materials for billiard balls from inventors. Then printer John Wesley Hyatt invented celluloid as new material, which he later registered as his manufacturing company's trademark. Celluloid can also be processed into various shapes because it softens when heated. And it has used in many fields including doll, toy, stationery, photograph, movie.

However, celluloid is no longer the most widely used plastic today because of its highly flammable character.