DJ Delorie wrote: > Exposure: 4 minutes in my exposure box (99x 395nm UV LEDs @20mA) holds > at 6 on an ST21 gauge. This is less than the Riston film, so will Would I be right in thinking that the ST21 is the step gauge you mentioned in an earlier posting? Who makes them? I've tried a quick Google search, but didn't find anything remotely useful... Thanks, -- Phil. ygroups@... http://www.philpem.me.uk/
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Re: [Homebrew_PCBs] MG Chemicals negative dry film resist report
2009-05-25 by Philip Pemberton