"He who marches out of step hears another drum." ~ Ken Kesey
you can use waterbase, or use a good amout of curable reducer or softee base. that will help the ink soak in. Waterbase is still better. Is your emulsion WB ready?
We print towels all the time. just be sure that enough ink is layed down. Also, make sure that it's cured properly as a towel absorbs a lot of ink, and takes a bit longer to cure.Good luck man and congrats on the order!Paul