Thanks for the detailed response! I never worked with „fresh“ art that tends to leaves junk so this got me curious. Good book scanners do exist and I use them for reproducing historical prints from time to time, but I must admit that the one I‘m using (owned by the university) is most-likely from the upper end of the price scale.

I prefer the book scanner because it doesn’t shine through the paper that is often printed on both sides in my use-cases.