Which brush characteristic helps assure a smooth application when using synthetic bristles?

• A. Use bristles that are frayed
• B. Dip in water before painting
• C. Hold the brush at a right angle to the surface
• D. Have flag ends on the bristles

Answer: (D)

Flag ends on synthetic bristles are tips that are slightly split or feathered to create a soft, flexible edge. This feature allows the brush to lay down paint more evenly and glide smoothly across the surface, reducing visible brush marks and edge harshness. The split tips increase control and paint pickup without skipping, which is especially important with synthetic fibers that can feel stiff. Frayed bristles would roughen the stroke and shed fibers; dipping in water before painting changes how the brush interacts with the paint but doesn’t improve tip quality; holding the brush at a right angle is a technique for control, not a bristle-design feature; flag ends specifically address the tip geometry that enhances smooth application.