The solid-state writing pen also means that there will be no ink staining, pen ball damage, cold ink, etc., the hand will not be dyed when writing a line break, and the front text will not be spent. The tip of the pen is made of special alloy steel. The principle of writing is the friction between the tip and the paper to produce solid oxidation color on the paper. It will not fade after 25 years of writing. This new type of pen will never let you fall into the embarrassing situation of lack of ink, because it does not need to be loaded with ink when writing with it. This "no ink" pen is made of alloys treated with special techniques. The writing on ordinary paper is similar