we have used an accelerated humidity test consisting of a 24-h cycle between 27-50 degrees c at 95 % relative humidity to rate the moisture resistance of typical protective films such as caf ( 2 ) , laf ( 3 ) , and fluorinated polymers ( tfe , fep ) deposited on baf ( 2 ) and nacl substrates .
C0016337
fluorinated polymers
C0032611
fep