| 摘要 |
A bristle brush for applying a cosmetic product to hair is provided with a sleeve having a longitudinal axis and at least one perforation. The brush is disposed within the sleeve so that brush bristles extend through the perforation for contact with the hair. The perforation is circular, arcuate, rectangular, square, triangular or trapezoidal in shape or at an angle with respect to the longitudinal axis of the sleeve. When the sleeve has a plurality of perforations, the perforations can be shaped alike or can differ in shape and/or in angle with respect to the longitudinal axis of the sleeve so that one or more predetermined performance characteristics are obtained when the brush is used to apply the cosmetic product to the hair. A method for adjusting brush performance characteristics is also disclosed.
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