• Sunny
exposures can cause colors to shift or
fade because
- The paint chalks more than in shaded areas.
- The color pigment may be subject to degrading
by
sunshine.
• Some “organic” pigments such as bright reds and
yellows tend to be faded by sunshine.
• Metal oxide “inorganic” earth colors are more
permanent; examples are yellow iron oxide,
umber, and brown iron oxide.
• Paint types vary in their general capability to
maintain color, especially
in
sunny exposures:
- Top quality latex paints hold color well.
- Economy latex paints are more likely to
change
color: flat
paints because of chalking;
satin and semigloss because
of darkening
with
dirt
collection.
- Oil-based paints tend to chalk and fade more
than
quality latex paints in sunny
areas.
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