Death March Kara Hajimaru Isekai Kyousoukyoku - Chapter 16

The thing about wood block printing being a new technology is BS.

If you ever produced a stain somewhere you are half way on producing a stamp (as in potato stamp). If you’re using wax seals you’re 99% there.
Simple stamps are just one idea apart from woodblock printing (the idea being to use a larger block of wood, instead of whatever you used to stamp before).
Lithography and metal based (whatever it’s called in English) printing techniques might be a bit further off, as they require special inks and surface treatments.

Ever heard of Gutenberg and his “invention”? It wasn’t much of one. Moveable printing letters were widely known, as was printing with metal. But before him nobody did combine those two. The moveable letters up there were made from wood. Which not only meant a short lifespan, but also that they were imprecise as they all were made by hand. (Though in China they already used moveable letters made from clay roughly 400 years earlier, but in Chinese that’s pretty much a dead end, because of the writing system)
Gutenberg just added the production method of lead casting the letters from reusable casts.
Another thing (lead casting in reusable casts) that already was around for some time.

So what he actually did was to think: Invention A + B + C = profit.
Funnily enough he actually went bankrupt. And a bank got her greedy mittens on this. (They sponsored him with loans, but bankrupted him with said loans just before it became a commercial success)