What is the primary purpose of primer in painting?

• A. Base for painting
• B. Priming surfaces
• C. To thin paint
• D. Base for painting, commonly used with oil and acrylic paintings

Answer: (D)

Primer provides a foundation for the paintwork. It creates a uniform, sealed surface, controls porosity, and improves adhesion so paint goes on smoothly and lasts longer. This is especially true for oil and acrylic paints, which benefit from a prepared surface to prevent uneven absorption, staining, or peeling. That’s why the best choice describes primer as a base for painting and notes its common use with oil and acrylic paints. The other ideas are incomplete or describe the act rather than the purpose (thinning paint, or just “priming surfaces”).