The invention relates to a method for producing a brush, particularly in the form of a mascara applicator, with bristles injection molded out of different injection molding compounds, using an injection mold (1) that has a main cavity (2), which forms the bristle support, and secondary cavities (3.1-3.12) branching off from this, with each secondary cavity forming a single bristle and with at least one first injection molding compound being injected into the main cavity, followed by a second injection molding compound in successive steps; at least one slider (4, 5 or 11) is inserted into the main cavity and closes part of the secondary cavities so that the first injection molding compound only travels into another part of the secondary cavities after which the slider is withdrawn and the second injection molding compound is injected so that it travels into the secondary cavities previously closed by the slider.