Brush for applying cosmetic substances

A brush for applying cosmetic substances, especially a mascara brush or hair coloring brush, which is injection-molded from plastic as one piece comprising:

• a first section for connection to a rod and a second section, said second section having a main body having side and end walls, wherein the width of the side walls are greater than that of the end walls,
• wherein both the side walls and the end walls each have a plurality of rows of bristles, each row of bristles extends in a longitudinal direction of the main body and each bristle protrudes radially outward from the main body,
• wherein the main body (4) is a polygon in cross section, a diameter of an envelope (H) of the cross-sectional configuration of the main body is between 1.5 and 6.0 mm and the bristle density at the periphery of bristle rings deposed around the main body is up to 35 bristles per 360° ,
• wherein different bristle configurations are provided on the side walls and on the end walls, a first tapered envelope curve (11) is formed by ends of the row of bristles on the end walls (7), a second envelope curve (8) is formed by ends of the row of bristles (5) on the side walls (6), and the first tapered envelop curve (11) is different from the second envelope curve (8),
• wherein the bristles (5) on the end walls (7) have a substantially identical length and the first tapered envelope curve (11) are located only in a region of a free end (9) of the main body (4).