Ultra violet (actinic rays) are non-visible light rays of short wave length occurring just beyond the violet end of the spectrum. Ultra violet rays are very destructive to paint and varnish films.. Found on http://www.probertencyclopaedia.com/browse/GU.HTM
Ultra violet (actinic rays) are non-visible light rays of short wave length occurring just beyond the violet end of the spectrum. Ultra violet rays are very destructive to paint and varnish films..