Which technique involves painting on wet plaster so that the pigment bonds with the wall?

• A. Gesso
• B. Glaze
• C. Fresco
• D. Lithograph

Answer: (C)

Fresco is painting on wet plaster so that the pigment bonds with the wall. When the plaster is still damp, the lime in the plaster hydrates and carbonates as it dries, pulling the pigment into the surface so the color becomes part of the wall itself. This yields a durable, integrated image on large wall spaces, like ceilings and plastered walls.

Other methods don’t fit this description: gesso is a preparatory white ground used on panels or surfaces, not painting directly onto wet plaster; glaze refers to a transparent layer used to modify color in other painting techniques; lithograph is a printmaking process that creates images from a stone or metal plate, not a painting directly onto plaster.