An ink-soaked fountain pen made these random ink blots. Ecoline’s “Fir Green” bled from yellow green out to dark turquoise, as it soaked into a wad of tissue.
Half of the trick is to recognise the happy accident, rather than toss the tightly-wadded tissue into a bin.
Ecoline inks are very water-soluble and any kind of water-based glue or medium will make them bleed, so I used a quick mist of solvent-based spray adhesive on the journal page, instead. I lay the flattened tissue onto the adhesive, and rolled it down flat with a rubber brayer.
I just like having this bright splash of a page, in the enormous antique Register that I use as a journal these days.