This category of additives can increase a paint film’s resistance
to ultraviolet (UV) light. Nearly all organic polymers are somewhat susceptible to
attack and damage by exposure to UV light. Even natural protein polymers such as
human skin can be harmed by sunlight. Frequent exposure to sunlight can damage
skin due to breakdown of organic cellular materials. Skin pigments and sun
screening lotions lessen this danger. Nonpigmented paint films lack sun-blocking
protection. In nonpigmented coatings, such as spar varnish for marine use and
automotive clearcoats, UV light protection is provided by screeners, quenchers or
selective light-ray absorbers. UV light is very powerful and tends to degrade This category of additives can increase a paint film’s resistance
to ultraviolet (UV) light. Nearly all organic polymers are somewhat susceptible to
attack and damage by exposure to UV light. Even natural protein polymers such as
human skin can be harmed by sunlight. Frequent exposure to sunlight can damage
skin due to breakdown of organic cellular materials. Skin pigments and sun
screening lotions lessen this danger. Nonpigmented paint films lack sun-blocking
protection. In nonpigmented coatings, such as spar varnish for marine use and
automotive clearcoats, UV light protection is provided by screeners, quenchers or
selective light-ray absorbers. UV light is very powerful and tends to degrade exterior finishes on cars, boats and homes rapidly in sunny regions.