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you will need to force about 5-6 cleaning cycles in order to push out the old ink and prime the tubing and dampers with the new ink. Best to do it in a row, otherwise the diffusion speed can mix the old with the new ink, giving a annoying gradient in printing between old en new ink.

Maybe I should give it try to use the sRGB color space as the target space when generating my profiles and see what happens in the perceptual intent when printing

softproofing with the sRGB vs AdobeRGB based profiles using the relative colorimetric intent (NO black point compensation): No difference using sRGB or AdobeRGB as target color space using the colprof.exe to generate both profiles.

I get this with my makeprofile.bat (using adobeRGB as the reference color space for colprof.exe): No difference in volume size and white point. Did you compare the other profiles with another using iccview.de ? I just tried my profile against your "better" profile using sRGB as the reference...

Could you upload the ti3 file so I can have a look at it and regenerate the profile again ?

Actually the best way is to buy (expired) violet ink cartridge from LPF Epson printers and suck the ink out with a large syringe: the gamut is way better than the home-brewed "Violet" Inktec Powerchrome ink.

The Blue one

You see I am a complete noob in programming :oops: Note: the SpyderPrint does supports strip reading, but spot reading is much more accurate and I can scan a 300 patch target faster with my CR30 than more than a decade ago with that terrible Spyder3Print device and still couldn't produce a...

Here it is the older drivers/software for Colormunki/iStudio: ccStudio https://colorconfidence.com/pages/downloads

All the files can be found on the topic I started and can be downloaded there including the python scrips and the targets (247, 266, 270 (Letter) and the latest 300 patch target) and argyllcms can be found on the website of argyllcms.com. Just do your work in finding the files.

I will try to write a compact how-to manual how to create a printer target with the CR30 + ArgyllCMS + Python scripts (thanks to @micronica and others) if I have some time later this weekend

I suggest to buy a chip resetter to reset the chips. The Pro 3800/3880 chips can be reset.

I have just found this link of the manufacturer of the CR30. https://www.chnspec.net/Spectral-Colorimeter-CR-30.html It does specifiy: spectrophotometer and look at the spectral range: 400-700 nm in 10 nm steps, which very similar to the 380-730 nm range of the i1Pro2 (also in 10 nm steps)...

I suggest to purchase the CR30 colorimeter (actually a true spectrophotometer). I think the price would be almost the same as your IT8 target and much more accurate (on pair with Colormunki/i1Pro). The one I have bought...

The software runs on Windows only and needs a com-port: maybe a virtualisation is possible in MacoS. The software is called ColorQC2 and is necessary to capture the LAB-values and the spectral data needed by ArgyllCMS to create the printer profile.

better a second-hand Colormunki: way better or the CR30 Colorimeter (about €60 new on aliexpress.com).

10 cartridges with 274 gram: about 27 ml per cartridge with is significant (also there is ink inside the tubing system and the dampers....thus you seen a drop of about 70% see pictures, so about 15-16 ml left in each cartridge). Yes the Epson Print layout does give you full control over...

Unfortunately the amount is much more: about 60% will be drained into the waste ink tank.....that is per cartridge so about 270 ml will be gone. Have a look at my post a year ago: https://www.printerknowledge.com/threads/my-new-epson-sc-p900-printer-terrible-amount-of-ink-down-the-drain.16565/

It is totally safe to update firmware on eco-tank printers: no chips on the bottles whatsoever, you can even put distilled water in the printer and it will print (without anythink visible on your paper though).

I am not sure, but my guess is the ArgyllCMS method take into account the total amount of patches chosen by which the black/white points and the neutrals (greys) are deducted from the total patch count and the rest of the patches are divided equally in the RGB-space to maximally avoid each other...