What is the advantage and disadvantage of different inner sharp of brush filament?
l Solid: Advantage: it is softer tip and Smooth
u Disadvantage: Heavy and not much good painting absorption
l Mini Hollow: Advantage: Good Pianting Absorption and light
n Disadvantage: Rough
l Cross-section: Advantage: Good Painting Absorption
n Disadvantage: the body is hard, not softer.
