Who invented Plastic?

Answer: Alexander Parks

The first man-made plastic was created by Alexander Parkes who publicly demonstrated it at the 1862 Great International Exhibition in London. The material called Parkesine was an organic material derived from cellulose that once heated could be molded, and retained its shape when cooled. 

Parkes also invented a process for removing silver from lead by extraction with molten zinc. Parkes was born in Birmingham, England.He also worked on rubber.

In 1855 Parkes patented the first plastic. By dissolving cellulose nitrate inalcohol and camphor containing ether, he produced a hard solid which could be molded when heated, which he called Parkesine.