Homebrew PCBs

>Yesterday I did some tests, and photoresist SURELY goes out it I try
>to clean it. 

The exposed resist should easily dissolve away in the solution leaving 
bare copper provided the exposure time was sufficient. No cleaning as 
such should be necessary. Agitation or wiping/brushing speeds up the 
process and allows for quicker and even development. It also disperses 
any green concentration in the solution that may hide the bare copper.

>I need to wash it with fresh water then let it dry a bit.
>Else, all I touch fades away

The unexposed resist should be much more durable than that. You should 
be able to skip the drying step and go straight into the etchant if 
inspection isn't required. Look into the exposure time, quality of the 
boards, concentration of the developer solution etc.. Try and contact 
someone who has worked with those particular boards. 

--- In Homebrew_PCBs@yahoogroups.com, "patroclus04" <patroclus04@...> 
wrote:
>