Why is it called "Inki" (ink) in the printing industry?

Recently, I have (inadvertently) seen many topics about printing ink on social media, and it really bothers me that most of them are written as "printing ink" (using the English-derived term 'inku'). It's not just recently; I've always felt a bit uneasy whenever I see printing ink referred to or written as 'inku'.

What we use for printing is "Inki"!!

Even if I'm called stubborn or nitpicky (bitter laugh), I am firm: printing ink is "Inki".

Why is it called "Inki" in the printing industry? This is because printing ink was introduced to Nagasaki from the Netherlands along with Western studies in the late Edo period, and it originates from the Dutch word "Inkt" (Inki).

In contrast, "ink" is English, and we call the ink used in stationery like fountain pens, or even in printers related to printing, "ink" rather than "Inki." It is widely used in this way.

This makes me wonder, "What exactly is printing?" Right? I mean, the English word for printing (offset printing, screen printing, gravure printing, etc.) is 'print,' so one might think that what you use to print with a printer should also be 'Inki'.

Printing and printing (with a printer) are the same in that they put characters or designs on paper or other sheet-like materials, but I distinguish them by saying that things that use a "plate" are printing, and things that don't are printers. And what you use when printing with a plate is "Inki," and what you use when printing directly from data without a plate is "ink."

Fountain pens and pens use "ink," but wait, there's an exception there too... The representative of permanent markers, "Magic Inki"... Oh! It's not printing using a plate, and it's a writing utensil, yet it's called Inki!

When I asked Gemini about this,

It said. Hmm. Looking into it just made the mystery deeper...

Well, to be honest, it doesn't really matter which one you use or when, but for me, having been near the printing industry for a long time, it makes me feel uncomfortable and itchy when printing ink is called 'ink.' This was just a super personal article.

By the way, the header image is a photo of color patches on the edge of a lovely print from "Printing Art Overview" that I happened to have on hand, since I didn't have an image related to ink. Four-color spot printing is great.