Question

why did the need for man made materials arise

Answer 1

Materials can be classified into 2 categories: MAN MADE:  Man made materials are processed, and can be made up of a mixture of raw and synthetic ingredients, which can make them resemble natural materials;  Man made materials, historically, have been prone to the reputation of being cheaper or lesser quality, however

Answer 2

man made materials were found when the resource's capability was understood by people. man made materials are cheaper and are easily available.