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
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.
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.