testing the new waterbrush pen
Today I came across mention of a waterbrush called The Piston, which resembles a fountain pen with the brush part made of synthetic fiber and rabbit hair, the barrel designed to air pump the water. You can also fill it with ink for Chinese calligraphy. Its advantage over the squeezable plastic-barrel of the waterbrush I already bought is that the amount of water dispensed by The Piston is precisely controllable.