Homebrew PCBs

The points I gave still apply, they are the reasons for easy to remove 
resist.

Although I wonder if you may be doing something a bit weird, no need to 
"let the board dry overnight", if you're leaving it wet with developer, 
that would be a problem ("developer" works as a stripper too, given 
time), rinse with water and dry it off with a paper towel as soon as you 
have developed it.

To give you an idea...

Clean blank PCB: 3 minutes
Attach film: 5 minutes
Dark Rest: until cooled (5-10 minutes)
Setup for exposure: 3 - 5 minutes
Expose: 2.5 minutes
Dark Rest: 3 - 5 minutes (if you bother, I don't)
Develop: 2 - 5 minutes in 20g/L warm Sodium Carbonate solution
Etch: depends on etchant
Strip: 10 minutes - 30 minutes in hot strong Sodium Carbonate solution

from a dirty blank PCB, to an etched board ready to drill, it takes 
about an hour including messing around with artwork etc...




On 05/09/13 13:30, twgray2007@... wrote:
>
> No, after developing and letting the board dry...usually 
> overnight...the resist just flakes off in some spots.
>