Method of producing thick-walled brushes, in particular toothbrushes

A method of producing brushes, in particular toothbrushes, with a grip piece and a brush head (1) supporting bristle filaments, comprising the step of initially producing a basic body including a neck area and a brush head in a first injection moulding cycle, and the further steps of transferring said basic body then to a larger die cavity and encompassing it with material in a subsequent injection moulding cycle, characterized in that the basic body is formed with a grip-handle core (2) in said first injection moulding cycle, and that, in said subsequent injection moulding cycle, the circumference of the grip-handle core (2) is covered with a hard component so as to form a multi-layered grip piece.