Re: Polymer Photogravure blarchive
I agree, Jon. Clay, I am able to get at least 7 stops. Chris ----- Original Message Follows ----- From: Jon Lybrook <jon@terabear.com> To: alt-photo-process-l@usask.ca Subject: Re: Polymer Photogravure blarchive Date: Mon, 02 Apr 2007 15:48:12 -0600 >Heh...I thought I was the only one who did stuff like that. > ;-) > >I'm actually able to get 31 (+ white) distinct steps with >the KM73 plates using a custom screen. I should probably >post a scan of a printed step wedge to my procedure >sometime to prove it to the non-believers. More is likely >possible, but it's tough to know when to draw the line. >31 seems to get me pretty much where I want to be. > >See >http://www.terrabear.com/procedures/polymer_photogravure.html > >Best wishes, >Jon > > >wcharmon@wt.net wrote: >> Oops. I thought that was off-list. Cryptic enough? >> >> >>> Thanks! I think that may be all I need to at least give >>> it a shot. It looks like the DR of the KM73 plate is 11 >>> steps, or 11*.15=1.65. That sounds consistent with what >>> I was doing last summer in a traditional copper gravure >>> workshop I took with Jon Goodman. In that workshop, we >aimed for interpositives with highlights at 0.5 and shadows >>> at 2.0 for a nice complete full range etch. Do you like >>> having some 'tooth' in your highlights? That is one of >>> the advantages we are finding for this particular >approach: you can easily create a curve that puts some ink >>> and texture even in the thinner areas of the inkjet >>>transparency. >>> >>>> Just came across this archive of info on someone's >>>> website who was studying Polymer Photogravure. It >>>> appears to be something of a combined blog and archive, >>>> hence, blarchive. Didn't really examine the core >website too much, but this doc seems to be a nice >>>> smattering of people's experiences with the KM73 plates >>>>, Solarplates, etc. >>>> >http://www.lillil.com/pdf%20files/lillil_polymer&photogravure.pdf >>>> >>>> >>>> >>> >>> >> >> >> >> > Assistant Professor of Photography Photography Option Coordinator Montana State University College of Arts and Architecture Department of Media and Theatre Arts, Room 220 P.O. Box 173350 Bozeman, MT 59717-3350 Tel (406) 994 6219 CZAphotography.com
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