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@The Hat - thanks for the link but those are more expensive than the Chinese ones; and I'm not clear yet about the electrical rating - 3 V or 5V and the power; I'll see.

I regret to say that I'm running out of options to fix your problem remotely, I would need the printer in front of me - e.g. I would replace the damper and use another one or watching the printout of a few nozzle checks to see if the missing nozzles remain the same or move around.

You won't see those small variances; all these tests just should show that it is impossible to rate and compare inks just with one global parameter - every ink/paper combination delivers a different result. I think it is about enough to group the inks into a few performance classes - like...

Your Aliexpress links don't seem to work anymore; I currently don't need a lamp for repair but just as a backup. I'm currently trying the 'made-in-China' link

I'm referring to the ink outlet at the damper - at the bottom. Just push the tube of a syringe into it and tilt it a little bit, there is a spring loaded valve in the outlet which has to open to let the ink to get through. If you take the damper out of the printhead carriage the valve closes and...

Do not push ink into the damper in the reverse direction - that may loosen the wire mesh filter. Connect the damper to the ink tube and pull ink at the ink outlet until the little round reservoir is filled by about half, you need to keep some air in that round reservoir. Insert the damper into...

Epson is providing an 'Advanced B/W Mode' - ABW in drivers of newer A3 and A2... printers which let you adjust the color tone of the gray level from sepia to steel blue - with neutral somewhere in the middle, and this separately for the lighter and the darker grays. But you need to do a few test...

Dye inks fade - as well in the dark - and even for a longer time https://www.printerknowledge.com/threads/fading-of-patch-sheets-in-the-dark.16099/post-142795 Pigment inks - you would have 2 types - one for glossy papers bringing you the gloss you would expect, and there is a pigment ink for...

Please let me make some comments to the measured values; it's fine that you measured the complete Lab* values. The b-value is negative in all cases with a value around -4 which let the black patches look like a cool black. That's typical for dye inks. The L* value on the matte papers are 15.6...

Some color measurement of black patches - e.g. running a patch sheet for icc profile generation - would help very much; I'm not clear why inks would be mixed for black; I don't see a reason that inks get mixed to black since there is a dye black ink in the inkset.

Pigment inks are currently not discussed; T089/080 inks are named as Claria Photographic inks. 114 and T54C inks are an equivalent substitute.

Confused - about what ? Color fidelity ? Are you creating and using specific icc-profiles ? The 114 and 673 inks don't have the same longevity - mixing them will cause color drifts over time.

Epson calls the 114 inks 'Claaria ET Premium'; you may use as well the T54C light inks which are very stable.

??????? https://www.idealo.de/preisvergleich/ProductCategory/10192.html?q=Epson%20T54C

I haven't had these 108 or 115 inks in my hands, that's probably rather new products brought into the market by Epson. Adding inks wtih additional numbers allows Epson to do different pricing for the same ink - the108 ink is titled as a Claria Premium ink for the L8160 which is a white printer...

I think it's inevitable - you need a particular amount of ink per nozzle for a cleaning action, and just look to the number of nozzles per printhead over time - the number of colors of the inks is growing and the width of the printhead as well - more nozzles give you a higher speed or a better...

I don't know if my comment fits here - if you are looking for a 17" roll paper printer have a look to the Canon TC-20 - a affordable Megatank 4 color 24" printer - it prints and cuts roll paper - it uses just 4 colors - the printer comes with GI-050 pigment inks but you easily can swap the inks...

Epson printers don't print with print resolutions higher than 720 or 600 dpi, all higher numbers just indicate how colors are dithered within a print dot. Qimage makes it easy - they display the acual print resolution settings used at print.

I'm not familiar with Epson's ink codes in their other business regions. I would trace back inks back to the printer models on wlhich they are used, some of the printer models don't change, others do - Epson likes to make and keep it complex - but it's no better with Canon.................

We only can assume wthat the marketing plans are by Epson or Canon or the other companies, earning money with inks is most likely one of them. It's not a surprise that the gamut of pigment inks is not wider or even similar in size as dye inks - and this with even very different ink counts -...