Structure of the Solid Ink-sticks

Traditional solid ink-sticks have been mainly used for calligraphy and oriental painting in East Asian countries. The ink-sticks used to be made from soot (or carbon black) and animal glue using their own family recipes at each country. We investigated the physical structure of the ink-sticks from micron to nanometer using ultra small angle neutron scattering (USANS) and SANS together. Differences in the structures of the ink-sticks collected from different countries will be discussed. *The authors, JIL {\&} MHK acknowledge support in part by the KIST (2V01331 {\&} 2V01344).