Direct printing on food and food packages with edible safe charcoal ink.
Charcoal is equivalent to food additive "vegetable terminal coloring matter."The vegetable coloring matter is defined as "charcoal-based substances obtained by carbonizing plants". Since we are using
vegetable carbon which is compatible with food additives standard test such as purity test of vegetable carbon dye, weight loss on drying, ash contents, so there is no problem on food hygiene.
Direct printing of non-permeable material is possible.
UV curable ink which cures by UV irradiation.
UV curing ink is instantly cured by UV irradiation. One pass can clearly print full color printing on non-penetrating materials which was difficult to print directly, and it can be expected to be used as a substitute for label stickers.