My problem with pre-sensitized boards is a) price and b) the fact that the resist chips off if I try to cut them to shape before exposure. My boards are small and I can use a sheet of pre-sensitized for a long run of prototypes if I can cut it. But I cannot. So I use the spray. Peter -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads