Pressboard is an electrical insulating material which is made of fibres.
Pressboard can be die-cut with steel rule dies and complete tools.
Pressboard consists of cellulose and does not contain binding material, so it is biodegradable. In case the pressboard is impregnated with insulating oils or chemicals, it has to be disposed separately.
Pressboard can be treated with die-cut tools or it can be drilled, sawed, milled and filed. Pressboard can be moisturized with water, so it becomes a bit formable, for example through spinning operations or edging.