Re: continued solarplate notes
Christina Z. Anderson wrote:
Very different. Is he using 5K, 3K, or 1K watts? Is he using inkjet positives on Pictorico or imagesetter film? If he's using the Dan Welden screen and imagesetter positive, the density of both those things is so great he could probably do 15 minute exposure times and get away with it. It would have the added benefit of finer dots due to the fact that light sneaks under a little during excessive exposures and burns out the edges of the dots. Getting finer dots this way is equivalent to a finer dot screen like what I use, but would be alot more abuse on the exposure unit. But heck, whatever works.So based on your theory Chris, if my ratio is 1:1 screen/image, I could do 10 seconds/ 10 seconds, or 1min/1min, or 15min/15min and it wouldn't make a huge difference? This might be true to some degree if one is using imagesetter film for both, since the density of imagesetter film is so heavy. I'd expect the dots would change size as time is increased though, since the longer exposures would allow more light to sneak underneath the edges of the dots. Easy enough to testJon,
I think there is an ideal set of times and conditions, but since people have different printers, printer settings, screens, bulbs, etc., etc. there's little chance it will be identical from person to person. I try to get the blackest black I can get without creating mushy plates with basic screen/image times, then start working with a curve from there, tweaking exposure only if absolutely necessary, but once I've found the ratio for a particular system, I try never to change it, and instead change the curve if, for example, the heads in the printer need replacing.