Bare skin contact with the quartz envelope must be avoided. Compoundsfrom the skin when heated on lamps operating at 600 to 850˚c will formpermanent etching (devitrification) on the quartz surface, decreasingUV energy transmission. A contaminated lamp eventually will overheatcausing premature failure. Alcohol wipes and rubber gloves are includedwith every purchase of a quartz sleeve or lamp. NOTE: In case ofcontact with bare skin, decontaminate lamp with alcohol wipe beforereturning to use.