Monotype number 6: oil based Gamblin relief ink on Rives BFK paper. I wanted to stick with water based media until the weather is warmer, since the home studio is unventilated and working with the windows open in winter is out of the question. For this print, I gave in to the temptation of oil based ink, and I can tell how much better the results will be from the very first print. The only drawback is the extra time and effort it takes to clean up without solvents.