Wow, the art of making marbled paper, a short film from 1970. Charmingly British, just like the film about the Teddy Grays candy factory or the putter togetherer of scissors. Super cool how the inks are placed on a water bath, swirled expertly to make patterns, and then transferred to the paper.
Also of note: the segment on the conservation of old books starting at around 9:55…I never knew they took them apart like that to dunk the pages in water! Sadly, the Cockerell Bindery ceased operation in the late 1980s with the death of Sydney Cockerell and its contents were sold at auction. (thx, matt)