The principle of large character and small character are quite similar, but its ink discharge is controlled by each single valve.

If it is a 7-dots nozzle there are seven separate valves to control it, so that the characters would be larger, generally used in the outer box, packaging or large workpieces, such as the rough pipe or asbestos, insulation board, etc. Its advantages are also similar to small character, but its speed is slower, at the average speed of 60 meters per minute, depends on the width of printing characters.