I'm making some unique gifts and would like to know how I can change the porosity of terracotta slip.
I would like a green colored one to be very porous, a blue one medium porous, an orange one less porous, you get the idea.
I was going to slip cast into plaster molds.
Any and all input is welcome at this point as I can't express the yawning chasm between my excitement to achieve this and the ability to do so. I have a very good idea on how to measure the flow rate once I have more control of the porosity.
Thanks in advance for any assistance.