Archive of the former Yahoo!Groups mailing list: Homebrew PCBs
Subject: Re: [Homebrew_PCBs] 10W ~380nm UV LED for exposing Riston & other negative film photoresists
From: Robin Whittle <rw@...>
Date: 2013-09-17
A correction: the exposure times I tested were 20, 40, 60 and 80
seconds, not 100 seconds. I got good results at 40, 60 and 80 seconds -
a 2:1 exposure range.
- Robin