| MadSci Network: Chemistry |
Dana,
There are lesser quality paints that will dry differently (cause the
light to reflect differently and make the color look lighter or darker)if
applied at different shear rates. In other words, some paints will dry
differently if rolled as opposed to brushed. Typically, corners are
brushed and the rest of the wall is rolled. There are higher quality
paints formulated to minimize this effect that will "level" or flow more
smoothly irregardless of shear, and will dry to produce the same smooth,
even coat.
Try the links in the MadSci Library for more information on Chemistry.