Quote Originally Posted by rajudp View Post
i am using photo resist from last 7 years. the given shelf life is 1 year but now also it is working fine with me. i bought from Bangalore in roll package ( 500feet roll)

The photoresist you purchased 5 years ago still work. Are you sure !! Is the resolution of the pcb good. I know a dealer in mumbai who sell dry flim solder mask how much do you require.