| Poor Gloss Retention: Deterioration of the paint
film, resulting in excessive or rapid loss of luster of the top coat.
Possible Cause:
Use of an interior paint outdoors.
Use of a lower quality paint.
Use of a gloss alkyd or oil-based paint in areas of direct sunlight.
Solution: Direct sunshine can degrade the binder and pigment of a
paint, causing it to chalk and lose its gloss. While all types of paint will
lose some degree of luster over time, lower quality paints will generally lose
gloss much earlier than better grades. The binder in top quality acrylic latex
paint is especially resistant to UV radiation, while oil and alkyd binders
actually absorb the radiation, causing the binders to break down. Surface
preparation for a coating showing poor gloss retention should be similar to
that used in chalking surfaces (see Chalking).
|