Picture Framing

Picture Framing: An effect of non-uniform color that can appear when a wall is painted with a roller, but is brushed at the corners. The brushed areas generally appear darker, resembling the “frame” of a “picture”. Also, sprayed areas may be darker than neighboring sections that are brushed or rolled. Picture framing can also refer to sheen effects.

Possible Cause:

Usually a hiding (coverage) effect. Brushing will generally result in lower spread rates than rolling, producing a thicker film and more hiding.
Adding colorant to a non-tintable paint or using the wrong type or level of colorant.

Solution:

Make sure that spread rates with brushes and rollers are similar. Don’t cut in the entire room before roller coating. Work in smaller sections of the room to maintain a “wet edge”. With tinted paints, be sure the correct colorant-base combinations are used. Factory colors, as well as in-store tints, should be thoroughly shaken at time of sale.