The conductive ink, is a set of special paper and circuit draw marker. "For the corresponding paper" This marker is usually not normally conductive expression on paper, you can be used only in the glossy photo paper for special paper or part of an ink-jet printer. Please refer to the "Product Description" or http://agic.cc/ja/support of this page for more information. Please be sure to use under the supervision of parents Children under 12 years old. You can not eat. Please previous marker is that you do not touch the mouth or wound. Please rinse immediately with water when the ink adheres to the skin, etc. also Although it is possible to pass a current of several A depending on the line width, please do not Please note ? decomposition to fever when passing a current of more than 100mA as a guide You can write about about 30m.