All plastics (polymers) degrade at sufficiently high temperatures, producing fumes with various hazards. Those materials presenting hazards at lower temperatures are discussed here.

This guide explains how to use three of the common composite casting materials, used in schools. 

This issue is bursting with loads of great articles from a wide variety of authors. 

The heating or bonding of materials to form shapes which can then be finished to provide a 3 dimensional representation of a CAD image.