Mocha Diffusion, also known as dendritic slip, is a technique that dates back to the 18th century. A liquid clay slurry called "slip" is applied to a piece of clay pottery, this layer of slip reacts with another stained liquid to create intricate "dendritic" branching patterns. The stained liquid and clay slip can be colored in almost any way, using metallic colorants and ceramic stains which can withstand the heat of the kiln. The chemical reaction is claimed to be the result of a difference in pH between these two liquids, though my personal observations don't support that claim. I use this technique to create tile paintings, and to decorate porcelain jewelry and functional pottery, I also experiment aimlessly simply trying to better understand the reaction.