i've been doing ziatypes for the last 10 years.. a great process, and a pretty easy one. Humidity is the big factor with it. my coating room is small, so it's easier to keep the humidity at a constant during coating (about 70% for my work). As far as brushes go.. even better than the Richeson are the brushes made by Tsuyoshi (Project Basho). He takes the Richeson bristles and puts them in a traditional wood Japanese handle. One of the only problems with the Richeson is the eventual corrosion of the metal ferrule. Tsuyoshi's modification gets rid of this. If you're ever in the Santa Cruz, Ca area. please let me know. .i'd be happy to give a demo