This popular Japanese sumi ink is good both for beginners and for professional work. Smooth, rich black. Hard to find. One of the popular sumi inks for calligraphy. 6.75 oz, 200 ml bottle.
"The Best Bottle Sumi Ink truly is the best bottle. You can write three to four times longer with a pointed pen nib before the ink dries between the tines enough to alter the writing (this compared to Moon Palace)." C. M.
My test for any ink is to see if it will produce sharp thick and thin strokes at less than one sixteenth inch body height with a #6 Mitchell nib. Stick ink passes that test while most bottled inks don't, especially waterproof inks including sumi ones. The brown bottle sumi [Best Bottle] is non-waterproof, and I find it is better than others. –S.W.