Fortunately many superb and inexpensive materials are available and the final choice may be somewhat arbitrary and the designer is advised to obtain samples of several candidates before making a final decision. Trade names do not represent a particular brand preference but are included for clarity. Acrylonitrile, butadiene, and styrene combine to form this common plastic often used to make housings or other mechanical parts. Acetates have good electrical insulating properties and is the material used to make movie and microfilm. Lucite and Plexiglass are trade names for acrylic which has widespread use where toughness and transparency are required.
Solvent cement is quite effective for welding pieces together.
A hard white ceramic-like material used as an electrical insulator where high thermal conductivity is required. Beryllium oxide is highly toxic in powder form and should never be filed or sanded and consequently has fallen out of common use. Power semiconductor heat sinks can still be found with beryllium oxide spacers for electrical insulation. Ceramics are used to fabricate insulators, components, and circuit boards. The good electrical insulating properties are complemented by the high thermal conductivity.