Dejinta iftiinka waxay leeyihiin shaqooyin kala duwan sababtoo ah qaab-dhismeedkooda iyo kala duwanaanshahooda. Qaar baa gaashaanka u daruuri kara, ka tarjumaya fallaadhaha ultraviolet ama waxay nuugi karaan fallaadhaha ultraviolet waxayna u beddelaan tamar kulayl aan waxyeello lahayn; qaar baa demin kara xamaasada xamaasadda leh ee molecules ama kooxaha ku faraxsan fallaadhaha ultraviolet si ay ugu soo noqdaan xaaladda dhulka, baabi'inta ama hoos u dhigidda dhacdada photooxidation Suurtagalnimada falcelinta dhimista; qaar ka mid ah waxay qabtaan xagjirrada xorta ah ee uu dhaliyo sawir - redox, si looga hortago falcelinta xagjirka ah ee u horseedda gabowga alaabta, iyo ka hortagga in alaabta ay waxyeello u geysato fallaadhaha ultraviolet.
Si looga hortago wax ku ool ah iyo dib u dhigista gabowga iftiinka ee warshadaha, in ka badan laba nooc oo ah xasiliyeyaasha iftiinka oo leh habab waxqabad oo kala duwan ayaa loo isticmaalaa in lagu nuugo iftiinka ultraviolet ee hirarka kala duwan. Waxay gaari kartaa saameynta ugu wanaagsan ee hal xasiliye uusan gaari karin.
Nuuxiyaha ultraviolet-ka ee lagu daro waxyaalaha la isku qurxiyo ee muraayadaha cadceedda ayaa leh hab ka hortag cadceed ah oo ku salaysan kala firdhinta ama nuugista dhacdada fallaadhaha ultraviolet ee dusha sare ee maqaarka, si maqaarku uga fogaado ama u yareeyo waxyeelada fallaadhaha ultraviolet.
