Black Velvet Watercolor Brushes by Silver Brush Ltd., feature a blend of natural squirrel hair and black synthetic filament that create an ideal working tools for the watercolorist, silk painter, and artists working with inks, dyes, acrylics or gouache. Squirrel hair holds large amounts of color and releases it with perfect control. By itself, squirrel is delicate, and for many applications it is too soft. When it is blended with a synthetic, it resists wear and maintains a wonderful snap and spring. This soft blend allows multiple layer glazing without disturbing previous colors, yet itís firm enough to lift color with a gentle scrub.