C-INK is engaged in producing and supplying metal nano-ink (conductive ink). Their nano-ink DryCure-Au and DryCure-Ag are made by cutting down organic impurities to a minimum compared to conventional nano-ink. As a result, they have incredibly high metal purity, minimum high-temperature sintering, stable ink condition, and reduced risk of cracking. By taking advantage of the properties of this nano-ink, it has become possible to produce wiring boards at low cost and high speed, which used to be made under complicated processes. The system for mass production is already in place and will be used for the wiring of electric circuits and LED signboards.