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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
CAUSES:
- 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, resulting
in variation in color, depending on method of application.
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.
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