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Having a successful painting experience depends on using a quality paint and a quality applicator. If you use a cheap paint brush, you'll have to live with the results - specifically, annoying bristles that break off and stick to your painted surface or unsightly lap marks that mar the looks of your finished project. To avoid these problems, it's well worth it to spend a few extra money for a quality artist brush.

The basic elements of a high-quality artist brush are materials and craftsmanship. The materials that make up a brush include: the brushing material or stock, whether natural bristle or synthetic; the plug; the insert; the epoxy compound; the ferrule; and the handle. Quality brushing materials are essential. Natural bristles generally come from Chinese boars and fall into three categories: natural white, natural black and natural oxhair. China bristles work best in oil and alkyd paints and stains, varnishes, shellacs and lacquers. It is recommended that natural bristle brushes never be used with latex coatings. The stock for synthetic brushes also falls into three categories: black nylon, dyed nylon and a dyed nylon/polyester blend. The latter is the most popular because of superior stiffness and retention. Nylon filament brushes work well in latex paints, oil and alkyd paints, and some stains and varnishes. Polyester filaments work in most paints, stains, varnishes, shellacs and lacquers. The ferrule - the metal piece that joins the brushing stock with the handle - works best when it is composed of stainless steel. Inside the ferrule is the plug. The plug is composed of wood strips that separate the brushing material into rows, creating a small reservoir and maximizing the amount of paint held in the brush. Wood handles are preferred by most painters. Hardwood handles minimize the penetration of liquids and reduce swelling if the brush is left overnight in water. Lighter handles are preferable, since they give the brush balance and facilitate control. Lighter handles also reduce hand cramping and fatigue. So select the right brush, and you may find the next painting project you tackle is a lot easier than you could have imagined.

China bristle hair, sable hair, camel hair, squirrel hair, badger hair, mix hair, golden nylon hair, brown nylon hair, white nylon hair, and synthetics hair. It is impossible to give absolutely accurate recommendations since the applicability of a particular art brush depends on many factors. Here are some general recommendations.

Protective Substance
If brush's hair is fixed by a protective substance then, before using the brush, put it into a glass of water with a temperature less than 50 C (122 F) for 5-10 minutes. After that rinse it out in clean water.

After-Painting Care
After painting, rinse a brush thoroughly trying to remove all the paint left. Use an appropriate solvent:

Type of paint

Solvent

Brush can be left in the solvent for no longer than

Longer time could result in a hair loss. After taking the brush out of the solvent rinse its hair in the water and dry it out at the room temperature.

Don't leave brush's hair in the contact with a bottom of the glass with a solvent even for a short time. Hair might lose its shape forever. Use a glass with a special brush's holder to prevent the hair from contact with the walls and the bottom of the glass.
Hair of a dry brush could also lose its shape. Keep a brush horizontally or on the handle (hair up).
If you use acrylic paints rinse a brush in the water immediately after using it. That is if you use many brushes all the brushes except one (which is in use) should be kept in the water. Acrylic paints dry out fast especially near a ferrule and they are difficult to remove afterwards.
Sometimes if hair lost its shape you might somewhat recover the shape by putting a brush into the water with the temperature 80-90 C (176-194 F) for 2-3 minutes.

Don't press on a brush while picking up a paint, painting or rinsing the brush (especially, if it has a soft hair).
Always rinse a brush in the water after using a solvent.
If you don't use a brush for a long time keep it in a closed box.