Thermosets are a group of engineering plastics which are particularly well suited to demanding requirements. For the engineer, they are materials offering outstanding performance which is well understood and proven through decades of success. For the manager, they represent substantial cost savings as a replacement for metals, and as an alternative to other plastics offering similar performance, but at greater cost. The hallmark of these materials is the ability to withstand heat and pressure for long periods of time, without failure. Their dimensional stability, creep resistance, chemical resistance, stiffness, and high temperature capability make them excellent choices where reliability under adverse conditions is important. KEYWORDS for this process: moulds, moulding, moulders, molds, molders