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This is likely a typo, both options should do gamut compression. -S1 is correct and works on both the perceptual and saturation table. The gamut in Colorsync is a plot of your measured patches and will not change with different settings in Colprof. To check the actual behavior of your ICC...

Right, that would be a welcomed option!

No, I cannot make a comparison with commercial software from X-rite or Datacolor as I do not own either. What I do see is that Argyll creates colorimetric profiles which give you the darkest neutral black possible with a particular printer-ink-paper combo. Deviating from neutral (and thus from...

That's exactly what Argyll promotos: strict adherence to the ICC-standard. If X-rite or others deviate from that and cheat a bit to get deeper, but less neutral black...then that is a deliberate choice. The ICC-profile does not change the black level, but the way it is interpreted and used by...

Argyll is, in fact, doing the correct thing which is minimizing colorimetric errors. This leads in some scenarios to raised blacks. You can use the perceptual rendering intent and ask Argyll to do minimal gamut compression when building the ICC-profile. This should give you lower black levels...

Nice illustration! Carbon black pigments have a much flatter reflectance spectrum. I suppose other grey inks are simply diluted black dyes with similar spectral issues? Have you ever checked your ET8550?

Well, I have different experiences.: * For the lighter tones, it's mainly the linearization (= hardware calibration) of the printer and inks (wildly different density or color tint). This can, to a certain degree, be corrected with a decent profile. * For darker tones, your black ink is very...

I had a quick look at the attached ICC profile. Your black level is very high (L=26, should be 5-10 on a decent paper). The black ink seems to be very brownish, as well. If you do wish to use this specific printer-ink-paper combo, I would not expect nice b&w performance...even after profiling...

Very interesting read! Regarding clogged Y + VM dampers: both those inks have significantly higher pigment load (= solids) than the other channels.

To get accurate patches for monochrome profiles, you should use a preconditioning profile. This would be one of your previous icc profiles of the same printer-ink-paper combination. As I wrote before, printing monochrome images does not equal printing a completely neutral grey scale. Your white...

Do you mean the square sponge pad on the left of the carriage? It's not connected to the rest of the spongy area and can be removed. Just pull out the left and right tab with flat tweezers (or push them through from the other side...you have removed the printer's bottom anyway). A nice soak in...

What I meant was that Argyll expects at least 1 white patch (Lab = 100,0,0). The .ti1 file you use does not contain such a patch. Maybe earlier Argyll versions were ok with that, but the current version is not. Anyway, I am not sure why you would want to generate patches around an absolute...

Argyll needs a reference white, and the attached patch set has a maximum L=98 instead of 100. You can either add it manually or, I believe, use the -f flag in Targen to limit the lab gamut.

I'll try to answer a few of your question based on my experience with the R3000. * Both halves of the capping station are connected to a single peristaltic pump. Make sure there is no dried ink on the seal or on the mesh/foam. Each halve seals 1/2 of the nozzles on the printhead * The "raw raw...

Hi everyone, I am looking for a new source of good quality, affordable RC-papers in Europe (Germany). My current supplier , Euro-Print on Ebay, has decided to increase its prices by 50% which makes their offers far less attractive. I used to pay about 22 Euro for a pack of 50 A3+ sheets...

Sorry, I never measured the actual differences. In practice, a proper printer - ink - paper combination is much more important. If a printer is not properly linearized for a set of inks + paper, you'll get nearly incorrectable color errors. With non-Epson papers (or papers not present in the...

T54C black seems to significantly outperform the others, both on density and fading metrics. A basic question: how are these targets printed? Highest quality mode & no color management like a profile chart?

This might help you to get an idea on how many patches you should aim for: https://rawtherapee.com/mirror/dcamprof/argyll-print.html

This might be an issue with the printhead ribbon cable. I have seen this in other printers when the contacts are wet or corroded. If you are a brave man, you can remove the dampers and printhead, unplug the ribbon cable, make sure all contacts are clean and dry, and reassemble the whole thing.

Looking forward to see the results. Would it be possible to mention the before-after L-values for the black inks as well? Keith Cooper was impressed with the deep black produced bz the ET18100...I wonder if all those inks reach the same DMAX.