To recap so everyone remembers, when I monoprint Stacked Journaling, I write with paint squeezed directly from the bottle onto a wide strip of parchment paper. Then I turn the parchment over onto my substrate- usually fabric, canvas or paper- and gently burnish the back to transfer the paint.
Once I've done this, though, despite it being called a "mono" print, there is still a lot of paint left on the parchment that I refuse to waste. Instead of wiping that paint away, I off-load it by spritzing it lightly with water and burnishing deli papers or 60# copy paper onto the parchment.
The result is a lot of fun, lightweight collage papers, which I go back into later with glazes of paint.
All of these collage papers were created in this way, a treasure trove of source material, all of which relate to each other and to the original piece (in this case, the first photo of this post!)
You paid a lot of money for your materials... never feel as if they need to be wasted just so you can experiment with techniques that are new to you!