Re: solarplate stochastic screen - Clarification
Asking for a NON "Ice Field" made screen from CopyGraphics has put a kink in me getting a screen - that request is apparently causing them some kinks. Would anyone mind helping me understand what the Ice Field does and why I don't want that - if indeed its enough of a conceren for me to look elswhere for a screen. Thank you for helping me over my ignorance bumps/mountains... Robert Newcomb ---- Original message ---- >Date: Thu, 22 Feb 2007 17:09:51 -0500 (EST) >From: Ender100@aol.com >Subject: Re: solarplate stochastic screen - Clarification >To: alt-photo-process-l@usask.ca > > Jon, > > I worked with Peter some years ago on generating > negatives with their imagesetter. Ice Fields was > used for image negatives because they were able to > use it to reduce some of the artifacts in the > negatives produced with it. It wouldn't surprise me > that you had better luck with a screen that didn't > utilize Ice Fields to rasterize the screen, since an > 80% screen wouldn't be printing the tones where the > artifacts occurred. > > I would suggest that anyone using a screen first > examine it closely on a light table and watch for > striping or moire patterns in the screen. I found > imagesetters to be somewhat unpredictable from one > day to the next in generating an artifact free > negative. Good luck! > > By the way, Chris has a good point about aquatint > screens. Once the legacy imagesetters all bite the > dust, what technology will be used to create > screens? The newer technology that creates plates > goes direct from computer to plate with no > intervening screen needed. These new machines > provide full color screens using a stochastic output > at a high resolution up around 500 pixels per inch, > though the dots per inch that the machine is using > to render this is much higher, Creo makes a > PlateSetter that produces 10,000 dots per inch, > which could probably go up to 625 pixels per inch > when reproducing a Photoshop image. I'm not sure > what sort of plate they use to hold that kind of > resolution. > > Best Wishes, > Mark Nelson > > Precision Digital Negatives - The System > PDNPrint Forum at Yahoo Groups > www.MarkINelsonPhoto.com > > In a message dated 2/22/07 3:28:45 PM, > jon@terabear.com writes: > > If you do order it from Copygraphics, please > clarify whether or not it > was rendered using "Ice Fields". Duane said they > quickly found a file > in my folder on their computers from 2 years ago > -- among many -- and > that it printed fine in a recent test swatch, > without the striations -- > but that's not the file from the version of the > screen I wound up using! > > When I spoke with him yesterday he said he would > look further into it. > Again, there were 2 different methods Peter used > to create the screen, > and I didn't prefer the one using Ice Fields for > some reason. If you > can get a quality version of the 1800 dpi screen > that didn't use Ice > Fields, that's what I recommend going with. > > Just a point of clarification so there's no > misunderstandings. > > Thanks, > Jon > > ************************************** > AOL now offers free email to everyone. Find out more > about what's free from AOL at http://www.aol.com. |