This is part of Sailor’s recently re-released of an older 4 Seasons ink series. Rikyu-Cha is an odd blend of green and brown. Like most Sailor inks, it is fairly lubricated. I really enjoy this one of a kind colour. The shading is just wonderfully. Why Sailor ever discontinued this ink is a complete mystery to me. It goes down a dark green but dries to a brownish hue. In the water test, all the green and brown hue washes away and strangely leaving just a blue colour.