Archive of the former Yahoo!Groups mailing list: Homebrew PCBs
Subject: Re: [Homebrew_PCBs] First Masque Transfer PCB (it no worky)
From: DJ Delorie <dj@...>
Date: 2010-04-03
Did you peel the protective film off after exposing? (yes, I still make
this mistake occasionally myself)
Note: most negative films want a 15 minute "rest" period (in the dark)
before peeling and developing; the reaction creates some gasses that
help with the hardening and they need to remain trapped by the film for
that time. Check with your board's instructions to see if your film
needs it.