Choosing the right material for a paintbrush depends on the type of painting you're doing and the kind of paint you're using. Here are some common materials used for paintbrush bristles and their ideal applications:

1. Natural Bristles (e.g., Hog Hair):

   - Best for oil-based paints.

   - Hog hair bristles are stiff and resilient, suitable for thick, heavy paint.

   - Sable hair, which is softer and more delicate, is preferred for fine details and smooth applications.

2. Synthetic Bristles (e.g., Nylon, Polyester):

   - Ideal for water-based paints like acrylics.

   - They don't absorb water and maintain their shape well.

   - Great for a smooth finish and are generally more durable and easier to clean than natural bristles.

3. Mixed Bristles (Blend of Natural and Synthetic):

   - Offer a balance of the properties of both natural and synthetic bristles.

   - Versatile for different types of paint and painting techniques.

When choosing a brush, also consider the shape and size of the brush, which will affect the final outcome of your painting. Brushes come in a variety of shapes like round, flat, filbert, and fan, each suited for different painting techniques and effects.

Click below links for more information:

https://www.china-bristle.com

https://www.brush-filament.com