This bottle is huge - 1 quart (32oz) will last me at least a year of regular inking and painting with it. I was happy to find that diluted with water I could get a good gray scale, because I also use india ink as a tonal value (shading) underneath watercolor paintings. It doesn't react to the salt trick as well as watercolor paint does for creating texture, however it is a great ink for sumi-e or chinese brush painting. It does make beautiful wicking dispersion patterns when drawn on to wet watercolor paper. Great for expirimenting with for fine art.