I'm binding a custom book.
The edges of the text block need to be painted black.
I've been experimenting with techniques but have not found the perfect one yet. The best I have so far is using clamps to hold the book shut and using a paintbrush to dry brush acrylic paint on.
This almost perfectly eliminates bleeding, but the pages stick together and tear a little bit when I separate them.
I have zero experience with airbrushing so I'm not confident trying that.
What is the best way for me to make my book edges black?