Homebrew PCBs

Grant,

Use a solvent to clean the screen but do it outside!  Acetone 
solvents work good and seem to make less odor. The lye or caustic 
solution is only used to strip ink from the etched board. Remember 
that the screen emulsion is water based so you will not be able to 
use any water based chemistry to clean the screen. Always wear gloves 
as the solvents will really dry out your hands.

BTW,  I have a photoplotter that makes negative or positive films if 
you need help with your layout. It requires Gerber photoplot data and 
aperture list or RS-274X Gerber data with the apertures imbedded in 
the plot data.

Tom