Digital BW, The Print

Thanks for the advice Paul. At present I'm in the middle of liearizing the UT14 IGFS profiles supplied by David Goldenberg for use on Epson Premium Semi Gloss. 

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul" <roark.paul@...> wrote:
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> "Mel" <chilterns@> wrote:
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> > I have printed off the 21step.tif using QTR_1400_UT14_IGFS_cool and a blend of QTR_1400_UT14_IGFS_warm and QTR_1400_UT14_IGFS_cool (75% cool and 25% warm and) and find bronzing on the black end of the step wedge. This is only on the 100% patch and only seems to be noticeable in daylight. None of the other patches are affected and it isn't noticeable when viewed in artificial (incandescent) light.
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> The 100% patches do sometimes show a different reflective character than the others.  I suspect most of it results from the large pigment load that is on the paper there. Paper type can cause this to vary.  I don't, for example, think I have had any noticeable problems with the MIS PK on Museo Silver Rag, but that is about the only pigment "glossy" printing I do now.  Due to the various pigment on glossy issues (and others) I've switched to dyes for high gloss.
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> > When using Epson Premium Semi Gloss paper with the Epson 1290 and the 1290 profiles with UT2 inks there was no bronzing - alas the 1290 "gave up the ghost" and is no more.
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> If you were using the UT2 as sold, with Eboni in the K position, the black was being generated by a dark midtone ink that had a much lower pigment load.  That translated into more glop (gloss optimizer is in the MIS ink base) per pigment particle.  That may account for the difference.  You might try experimenting with using the UT14 glop (Y) to see if you can accomplish the same result with that inkset.  You'll probably have to lower the K ink limit or boost as you add glop.
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> > 1. Could UT2 inks be used with the Epson 1400.
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> Yes, but you'd have to come up with the profiles.  The old UT2 profiles will not work as is.
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> > 2. Is it possible to use Epson Premium Semi Gloss paper with UT14
> >    inks or is there some incompatibility between ink and paper 
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> I don't know of any incompatibility.
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> Good luck with the setup.
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> Paul
> www.PaulRoark.com
>