I could do with a bit more explanation. Why does the man print multiple copies of the same plate, but each with successively lighter ink, or less ink? There's

I could do with a bit more explanation. Why does the man print multiple copies of the same plate, but each with successively lighter ink, or less ink? There's a comment about the texture of the ink layer produced by the dauber or pouncer, but they don't show us that, or indeed ever let us get a close look at a page. Some magnified images with raking light would have been nice. Why is the plate so small, or was that the size of the book (possibly "tricesimo-secondo", 3.5 x 5.5 inches)? The impressed pages have a distinct rectangle pressed into them. How would such pages be bound into a book, i.e. glued on to larger sheets? sewn or what? Was the plate being used an original by Blake, or a reproduction? Was this an on-going project to reproduce an entire book (Songs of Innocence, it appeared) and if so, how long would that take? Or was it a one-off demonstration for the film?