Water resistant: dyestuff ink particle is easily soluble in water and will bleed on the paper, pigmented ink will bond itself to the paper fibers once it is settled, it is not soluble in water. Light resistant: the size of uni super ink particle is larger than dyestuff ink. Therefore its surface is less affected and the colour remains vivid. Time resistant: difference between structure of molecules. Molecules of dye ink break down because of the sunlight and air but uni super ink is difficult to break down.