Homebrew PCBs

I think I used to expose the photoresist for about 5 minutes under the sunlamp. I used glass to hold down my negative on the board. Has been a while since I have done that though.

 

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] 
Sent: Sunday, August 21, 2016 7:25 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Re: First Negative developement Brd

 

  

Thank you to all that replied to my questions. There seem to be a lot of differences in the amount of time board is under light. From  one minute up to eight or more minutes.

A test to the light system to determine how much time is in the works today. I have foam

brushes to eliminate the rocking I was never happy with with etchant.