Homebrew PCBs

Hi all,

with this question I pick the occasion in order to introduce to me, I 
write from Italy, use for my designs Circad, therefore we can exchange 
information and councils on this program, I realize from many years the 
pcb in house is mono that double face with the photogravure, hard 
development with caustic and then muriatic acid + hydrogen peroxide.

Fisio