Hi Lou, Yes, I was thinking the same thing, until he described some details on the trash containers that sound like it should be pretty sharp with any process. I wonder if its a high ink limit issue; I asked for details on the inkset and paper, maybe that would help answer the question. Best regards, John Moody -----Original Message----- From: DigitalBlackandWhiteThePrint@yahoogroups.com [mailto:DigitalBlackandWhiteThePrint@yahoogroups.com]On Behalf Of Louis Dina Sent: Tuesday, November 08, 2005 11:05 AM To: DigitalBlackandWhiteThePrint@yahoogroups.com Subject: [Digital BW] Re: QTR vs BO sharpness There may or may not be a parallel here, but when sending jobs to a printing press, you will generally see more "apparent" sharpness when using a coarser line screen. A 133 lpi screen will appear contrastier, hence sharper, than a 175 or 200 lpi line screen. The finer screen tends to reduce the differentiation of contrast and sharpness in favor of smoothness, since it is filling in more white space on the sheet. I wouldn't be surprised if the same effect is showing up when printing with BO vs. using QTR or any other RIP using multiple inks. If this is the case, which makes some sense to me, then I don't see that as a problem with QTR so much as it is a workflow problem. I know I have to consider the line screen when I design a job for press output, and will increase the contrast and sharpness of my final images to account for it. At least in press work, it is just part of the territory. Lou Dina --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "djon43" <djon43@y...> wrote: > > "John Moody" <moodymz3@y...> wrote: > > > > Have you used QTR-create-ICC to profile both BO and the curves you > are using > > with QTR? That would output both prints with the same tonal > characteristic. > > If this has not been done, I wonder if the BO shadow compression is > > generating more contrast in the features that appear sharp? > > John, May I ask you to try that? I don't have your expertise: I'd be > very interested in your results (comparing best QTR sharpness to BO). > > I hate to be the only person reporting a QTR sharpness problem...maybe > I'm really describing MY problem, rather than a flaw in QTR... > > ...it seems a fault if QTR requires a profile that matches BO in order > to arrive at maximum sharpness. It also seems a fault if it requires > different post-processing sharpning (as it may). > > BO obviously does create more contrast in shadow details* than QTR, > but "smart sharpen" of shadows (one of the Photoshop "smart sharpen" > adjustments) in post-processing does cause QTR to approximate BO > sharpness...a matter of tinkering. > > * shadow details for Photoshop CS2's "smart sharpen" seems to mean > control of dark areas that contain whites as opposed to control of > dark details contained by whites...in practice this is not the same thing. > Please visit the Group Homepage to check the Files, and other resources as they are often being updated. http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint If you wish to receive no emails or just a daily digest, or you wish to unsubscribe, please edit your Membership preferences by visiting this same page. 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Message
RE: [Digital BW] Re: QTR vs BO sharpness
2005-11-08 by John Moody