Catalyst™ Polytip Bristle brushes are another Princeton breakthrough that advances the science of synthetic hair. This new series is super stiff yet still extremely responsive. Unlike natural hog bristle, Catalyst™ has real integrity in water. Natural bristle can be rendered useless when it is water-soaked. The true advance in Catalyst™ is the Polytip feature. For the first time, the tip of each individual hair has been split to replicate the natural flags on the finest natural bristle. By giving each individual hair 2 to 3 distinct tips, Catalyst™ is able to hold a higher volume of paint while providing a smoother application. Designed for use with medium to heavy-bodied acrylics and oil paints, Catalyst™ pushes even heavy gel media with assurance. Catalyst™ Polytip Bristle brushes truly are tools that move paint.
- Next Gen Synthetic
- Maximum Stiffness
- Flag tips to replicate the best Chungking Bristle
- Precise control and shape retention
The Princeton Catalyst Polytip Bristle (Series 6450) Round is a high-performance synthetic brush designed specifically for medium to heavy-bodied acrylics and oil paints. Featuring advanced "Polytip" technology, each hair is split to mimic natural, fine-flagged bristles, allowing it to hold significant paint volume for smooth, controlled application.
Key Features of the Series 6450 Round:
- Best For: Heavy-body acrylics, oils, and gel mediums.
- Hair Material: Stiff, durable synthetic Polytip bristles.
- Design: Short handle with a traditional round shape, ideal for detailed work, strokes, and shaping.
- Sizes: Available in a wide range, including 3/0, 0, 1, 2, 3, 4, 6, 8, 10, and 12.
- Performance: Provides the stiffness of natural bristle while offering better paint retention and cleaner, more consistent application.
- Versatility: Capable of detailed work (smaller sizes) and covering larger areas with specific shapes (larger sizes).












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