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Check the seals on the cartridge outlets and look inside the cartridge bay for signs of ink leakage. I had a bad seal on a refilled cartridge on my 3800 and the ink was emptying into the innards of the printer. Replacing the cartirdge cured the problem but there was still a lot of ink inside...

It's not obvious to me why you have trouble with row W and not others. However, looking at your profile I see a very small colour gamut which means that all saturated or dark colours will be degraded. This may make it difficult for Argyll to recognise the measured colours because they are just...

That suggests that the A2B (soft-proof) table of the profile is not very good. The analysis performed by software like GamutVision or ColorThink relies on the A2B and B2A tables being in good agreement. If the actual print is not like the soft-proof then the only way to evaluate the profile, as...

I'm pleased that the batch file is working well for you - even if we did have to modify a few parameters in the Argyll commands! Difficult to say why one patch should should cause problems. It may be because the printed colour is too far away from the expected value or possibly because there is...

I think you may be underestimating the effect of those wobbles, at least if you believe the soft-proof. Here are the soft-proofs for the original (left) and the B&W "optimised" profiles (right). The original is pretty good which is more than I can say for the optimised version. I wonder if...

I thought it may be helpful to see what GamutVision tells us about the profiles, so here goes. First, as ISF says, there is no useflul increase in the colour gamut after optimisation, although GV does show a very small increase. Second, the firsrt optimisation is different from the original...

Personally I would risk the cost of a new LK cartridge and see how it works. If it turns out that there are major problems you can always sel the "new" LK cart.

The jpeg image seems to have rasonable gradation in the region that the OP showed, but the L- values are very low - between 1 and about 6. This is obviously a difficult tonal range to reproduce without a good profile and with BPC. I agree that the OP should use a greyscale ramp to examine the...

I think you have to give us a bit more information about how you printed this image. What paper, and what rendering intent for a start. If it was colorimetric rendering did you use blackpoint compensation? It looks rather like colorimetric rendering without BPC where the black in the image...

The profiling experts (I don't pretend to be one!) all seem to deprecate any editing of output profiles. It seems to be felt genrally that the Datacolor facility was put there because the profiles were not very good in the first place, but I've never used it so can't really comment on that. I...

The CMYK profile that you generated is pretty awful! Your printer is an RGB device and I can't begin to guess what happens when you feed it an RGB file and force it to use a (bad) CMYK profile. As for when -d4 is useful, I would say, for anyone using the OEM printer driver, never! Stay well...

If you have generated a good profile with ArgyllCMS the prints will be a good colorimetric match to the colours in the image file. In other words, the print lightness values will be a good match to the lightness values in the file. The only way that you can make them match visually is to...

Looks as if the problem is in your version of CAP480.bat. The targen parameter -d4 will give you CMYK; sure enough your .ti1 file is CMYK. Change that parameter to -d2 and you will get RGB.

The Epson diver always uses some colours when printing B&W. The Epson black/grey inks are not neutral and need to be "adjusted" using some colour. Like most (all?) pinters, the Epsons will not print if one cartridge is empty.

It's in there somewhere, and by all means use it. Here's another possible - taken on Christmas Eve 2014. Sorry about the snow.....

I don't know about the P800 but using the Epson driver, the 3880 will print upto 950mm. I think Epson say 17" x 22" because it's the largest paper they sell! You can set any custom paper size up to 950mm on the 3880.

You might like to try "Darker". I find this gives better linearity.

I just did a plot of the L values and I must say it doesn't look too linear. The contrast in the shadow region is quite low, with a relatively high Lmin. What settings are you using in ABW?

If you want to check the linearity you really need to print and measure a step wedge. The most common is a 21-step wedge that goes from L = 100 to L =0. I don't know much about the ColorMunki but you might find this article by Keith Cooper useful. He gives a 21-step file for the Munki and...

I was wondering that too. The 95,0,0 is actually paper white, and I've never seen a paper that is perfectly neutral. Of course if "Highllight Point Shift" was selected in ABW then some ink would be laid down but it's hard to see it being perfectly neutral.