I use scraps of watercolor paper that I added layers and layers of paint on.
I love making these papers to use in my artwork.
This is what I did with the papers from my last post...
I made the book covers out of them.
And here's a shot of a couple of pages that I have sewn inside the book.
Not all of the pages are painted at this point. I usually keep these small books to the side of my work table and as I have extra paint (or ink) left over at the end of a work session, I smear them onto one of the pages in whichever book I grab first.
You could say that my studio is spilling over with painted papers.