That little compact in your purse can get you basic makeup results, but a professional job often depends on the expert use of a contour brush. They come in different sizes and bristle angles, but they all have the job of smoothly applying makeup powder to a relatively large patch of skin. They might be better for the nose or cheeks because liquid makeup might apply unevenly and because the nose tends to sweat and appear uneven.
The nose is a particularly difficult job because of all the angles and all the small pores. Makeup artists often modify the nose to achieve either a softer or more angular look. They might struggle to apply makeup that adheres to the surface and is not smudged by perspiration during a hot act. Girls working in the office might have a similar experience, at least in that they might be too busy to notice smudges. A contour brush provides versatility.
Some have fine bristles and a diagonal edge. These might work with both cream and powder makeup. The makeup is usually applied with an applicator and then the brush is used to smooth the job. careful smoothing can make shape adjustments look more real. The cheeks can be made to look more hollow and the nose more angular if the actor needs a dramatic appearance. A girl in the office just needs to look her best without her makeup seeming too obvious. Careful retouching with a brush can save face.
A flat brush can actually be used to create sharper definitions between makeup colors. These are often used for costumes and for showy makeup. For everyday use, strong edges might be desired for eye shadow or blush. A flat brush reworks powder in such a way that the powder is evenly applied on the skin but the edges between colors are easy to preserve. This is different from a round brush which inevitably sweeps off-center.
Some brushes are medium-sized but the bristles are cut at an angle. These can help create sharp contours like a flat brush but are also ideal for applying makeup. The stiff bristle surface can pick up much more power than a round brush. While a round brush will apply makeup gradually and softly, a diagonal brush will pack on the color.
Whatever your needs, look for a source that has many different makeup brushes. There is a resource available for you. Check it out and see if there is a brush for your use and your price range.