-watercolor (I like Dr. Phil Martin Hydrus Fine Art Watercolor, but I think almost any watercolor you can get on a paint brush will work)
-a paint brush per color
-little jar or cup for every watercolor color
-thick watercolor paint brush
-nib and nib holder
-optional: blow dryer to speed up the drying process
I used my thick watercolor paint brush and dipped it in water. I intentionally painted the watercolor paper with just water.
Then i dropped some watercolor into the water section of the watercolor paper.
I swooshed it around for an organic design.
I swooshed with three other colors. Water, drop, and swoosh around.
I then used a blow dryer to speed up the drying process.
I like using Dr. Phil Martin's Hydrus Watercolor, but its not necessary. You can use any watercolor as long as its runny like regular black ink. But I used two drops of Dr. Phil's Hydrus Watercolor and two full pumps of water from an eyedropper in a little plastic cup.
I would then get a paint brush, dip it in the watercolor, and brush just a little into the nib. (I would practice writing with watercolor filled nib until you can figure out how much watercolor you need in the nib.) Then I would write a few letters.
I would then paint a different color on the nib. (Lean the nib and nib holder upright.) I would just fill just a little bit of watercolor, just enough to write a few letters.
Repeat painting some watercolor on the nib and writing.