to all: Kaimei ink is far superior to the Sumi (which is o.k.), but will not eat the nib up as Sumi will. Plus on every paper I tried it on it worked beautifully. What other ink is available that sits up on the paper, dries to shine, will not eat your pens, and smells great? And if that isn't enough, being carbon based will photograph extremely well for the Gocco Printer. How's that for a recommendation? Now where to buy it - The last purchases I made (several years ago) was in a small calligraphy shop on Grant Street in San Francisco's Chinatown - name unknown, sorry. I have seen it in some catalogs, but not recently - perhaps Dick Blick or some smaller catalogs? The last I bought was a 360 ml yellow bottle , but unfortunately I'm not conversant in Japanese which is the label on the front - a rectangular shaped yellow plastic bottle - the only English printed on the label, "Kaimei Carbon Ink, made in Japan". If you find it, be sure to buy it, if you look for it - keep looking til you do find it...very well worth the effort. I'm sure it's available in the U.S.-somewhere.