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Subject: Re: [Homebrew_PCBs] MG Chemicals negative dry film resist report

From: DJ Delorie <dj@...>
Date: 2009-05-26

Philip Pemberton <ygroups@...> writes:
> Would I be right in thinking that the ST21 is the step gauge you mentioned in
> an earlier posting? Who makes them?

Yes. http://www.stouffer.net/TransPage.htm