I love the idea of painting the fore edge of a book. This is the edge of the paper opposite the spine.
This seems to have three main styles.
1) "spray" edges where one or all naked edges of the paper is coloured. It was quite common to colour just the top edge of the book to protect it from dust and sun damage. But more modern styles will spray all three edges and sometimes use stencils to add a design.
2) Fore Edge painting. Painting a design on the edge of the book - either just the fore edge or all three edges.
3) hidden fore edge painting. This is where the image is invisible until we fan out the pages, then it shows up.
Fore edge painting is an English
art going back well into the middle ages. It became more popular after the printing press and is an endangered craft. If I remember right, there are only two full time fore edge painters in the world - one is Martin Frost... the other I can't remember but will figure out as we go along.
These days it's popular among book collectors all over the world. Newer book sets are often painted like Lord of the Rings, Harry Potter, etc. And more common in the 20th Century is to paint the edges of gilded (gold edged) antique
books to increase their value.
The gilding helps hide the painting even more.
More modern versions we see on tick tock and other social media have people using acrylic and spray paint. I find this amusing because they then have to separate all the pages one by one and often rip the book.
Traditionally watercolour is used for a few reasons
- it doesn't glue the book together
- it is often archival so won't damage the paper
- has qualities that will protect the paper.