Acronym and details:   also referred to as polyoxymethylene (POM) and polyformaldehyde

Group:   thermoplastic

Developed:   1957

Trade names:   Delrin; Kematal

Manufacturing process:   extrusion; injection moulding

Cost:   medium

Colour:   naturally white, but any

Transparency:   translucent to opaque

Rigidity:   always rigid

Feel:   hard

Smell:   none

Other:   strong; recognised as the first ‘engineering’ plastic

Typical uses:   gear wheels and mechanisms; disposable lighters; bathroom taps; plectra and guitar picks

Degradation:   stable