Re: Photopolymer Plate Options
All of you doing solarplate, what is the exact specifications of your imagesetter aquatint screen so I can order one? I am using the Welden one, and was wanting to try one from Copygraphics as comparison. Chris ----- Original Message Follows ----- From: Jon Lybrook <jon@terabear.com> To: alt-photo-process-l@usask.ca Subject: Re: Photopolymer Plate Options Date: Fri, 16 Feb 2007 16:24:24 -0700 >Hi Keith, > >I actually learned the splash/scrub technique from Dan >Welden, but my time in the drink is shorter. I think he >now recommends 90 seconds. 35 is what seemed to work best >for me with my plates/screen/exposure times/curve/light >source, etc. > >35 seconds might, of course, produce different results >under your approach if you're using the standard aquatint >screen -- even if we're using the same plates, etc. I'm >sure you know this, but it seems pertinent to mention it >here. > >It's like an inverse domino effect. Once the preferred >approach is established, each parameter is related to all >the others by necessity to get consistent results. If one >is out of place or somehow different, then only some of >the dominoes will fall: > >___ |||| > >:-o > >And if you do decide to move one of the dominoes as an >experiment, other ones must also be moved accordingly for >it to work in a similarly consistent manner to your proven >and preferred approach. > > >___//// > >:-) > >Jon > >taylordow wrote: >> Hi Chris, >> >> I've never used a washout higher than 70-72 degrees with >> either types of plate, although I admit to extending the >> time very occasionally from 2 to anywhere up to 8mins. >> No scientific reasoning going on here, other than some >> plates and exposures you can just <feel> need a little >longer washout. Naturally, I'm curious to try Jon's times >> of 35sec. I tend to let the plates sit still in the >> water for the first minute and then gently scrub them in >> a linear movement, rotating the plate 90 degrees each >> time. Rinse with cold water and immediately blot with >>sheets of newsprint to remove excess water. >> I'm using an aquatint screen that I got through Dan >>Weldon. >> Keith. >> >> On 2/16/07, Christina Z. Anderson <zphoto@montana.net> >>wrote: >>>> Jon, Nancy, Keith, etc. etc. >>>> >>> >>> "............. I also notice that 100 degree washout >>> for 5-10mn is recommended whereas solarplate requires >>68-78 for 2 mn. " >> > 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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