Hi Paul. Iʻm using a Mac running OSX 10.10.5 and the printer is a 4880. The set of inks is based on a dilution you mentioned in another message here relating to Arches and Eb6 / C6C. I think you are calling these dilutions Carbon-6, to distinguish them from the standard MIS Ebon-6 dilution.
Y = Eboni MK (100%)
LM = Eb6-LM (6%)
LC = Eb6-LC (9%)
M = Eb6-M (18%)
C = Eb6-C (30%)
LLK = light blue toner (13.75% Canon Lucia Blue, 11.25% Canon Lucia Cyan [note this is a 55%-45% color pigment blend], and 75% clear base [C6b])
LK = Eb6-C (30%)
K = Eboni MK
This is a slightly different sequence than the one in your pdf "Eboni Carbon Variable-Tone Black-and Whte Inkset, Epson 3800 / 3880 Printers" The ink configuration there switches the Y and LLK inks, so that the blue/cyan toner is in the Y position. The configuration above has worked very nicely with your Arches 3880 profiles. Thanks again for making them available.
I have installed your variable tone 3800/3880profiles, but have put solvent in the LLK / tone position for now, until I obtain the blue / cyan inks. Iʻm not using curves #2 & #3 for now. As I mentioned, I have only printed on Arches up to this point, and now need to linearize and use the profile EbVT-EpsonHPn-carbon.
I did attempt to build the curve for Epson Hot Press Neutral from the ground up, but ran into a hitch with the second printing of the ink pattern page in calibration mode. My black ink limit is 45, but the page prints out with 2-3 random patches of much darker ink in each of the light - dark sequences for each of the ink channels. Never seen that before. Maybe because of the non-standard ink setup?
- Jan
---In QuadtoneRIP@yahoogroups.com, wrote :What printer and computer platform are you using? Is the ink arrangement standard Eboni-6 or one of the variants?PaulOn Mon, Mar 7, 2016 at 11:53 PM, janbecket.net@... [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:When MIS shifted the Eboni 6 formulation, I decided to also shift my base from C6B to C6C. This is the base formulated by Paul Rorark primarily for use on Arches traditional watercolor paper. I downloaded the set of curves from his website, linearized w/ my Colormunki and got perfect, straight-line graphs on the first try. I like the images Iʻm getting on Arches Aquarelle Hot Press with the curves.
96.54635591.59732272.62270165.38996454.0403946.87013940.51006536.75171234.59137530.36527726.65663822.81463620.60535619.52791219.16786318.5848217.5542517.25604616.92338816.52992516.253277
On the downside, I need to make some larger prints for an upcoming exhibit on my usual roll paper, Epson Hot Press Natural. I cannot come up with anything better than a lumpy, misshapen graph. I was lucky to get even that - most of the day I received the message that the curve could not be created because the L values were not increasing at a constant rate. Never had that problem before w/ the Colormunki.
The EbVT-EpsonHPn-carbon curve I downloaded printed so dark in QER Calibration Mode that my Colormunki could not distinguish among most of the lower values, and in fact the ink was visibly puddling on the paper. I finally ended up setting ink limits to 25 - and the resulting print was still very dark. With the curve I obtained, the prints are now far too light. Something is not working ...
Thanks in advance for any suggestions!
The L values I obtained, such as they are, from the 21-step wedge are as follows:
Message
Re: [QuadtoneRIP] Re: C6C base on inkjet papers
2016-03-09 by Paul Roark
Is it possible you are using the Epson HP curve from the 7800 Eb VT instead of the 3880 version? That would be somewhat consistent with the densities your getting.
Also, be sure you're not using the Y position and that second MK.
The random dark patches sound like trouble that goes beyond the profiles. If this is the same inkset that worked well for the Arches, it makes me wonder what could have happened between the two.
Do you have an agitation routine? I pull carts once every one or two weeks, agitate them, and then let them sit overnight (or for a few hours) before turning on the machine. I then at a minimum print a purge pattern once a week.
With the 4880, I don't think you need to bother with the C6C as opposed to the C6B. Getting that other surfactant can be difficult. The only saw differences with the 1400 and Arches. If properly mixed, however, the profiles for all the bases are the same. The base does not significantly affect what profile is needed.
If a new batch of ink was mixed between the two, some mistake in mixing might have happened. Also, I at least once saw some problems that appeared to be causes by too little stirring of the chemicals. Some of these fluids need to be mixed almost like they are solids in the sense that they'll lump together if not thoroughly mixed at the outset.
Paul
On Tue, Mar 8, 2016 at 4:08 PM, janbecket.net@... [QuadtoneRIP] <;QuadtoneRIP@yahoogroups.com> wrote: