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Poor
Gloss Retention: Deterioration of the paint film,
resulting in excessive or rapid loss of luster of the top
coat.
Possible Causes:
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. |
