Plastics are considered a type of organic and semi-organic materials and manufactured polymers, and there are many types of plastics, but until the year 1930, the well-known plastics were celluloid and bakelite, and then many types of plastics were discovered, including nylon, polyethylene, terylene and bocystrin. It is noteworthy that the Belgian-American scientist Leo Baekland was the first to make plastics in 1907.