The stylus is one of the basic tools for drawing, which can draw uniform and consistent lines. The pen body is pen-shaped, and the nib is a hollow steel ring, about 2cm long, and a movable thin steel needle is hidden in the steel ring. Swinging the needle pen up and down can remove the paper fiber blocking the nib in time. Check every pen when you buy it. The specific operation is: 1. Swing the needle pen up and down to see if the thin steel needle in the nib is flexible, and the length should be slightly longer than the nib for later use. 2. Open the pen cover and observe whether the integrity and flexibility of the suction bag are normal.
Matters needing attention
(1) When drawing lines, the needle cylinder should be kept perpendicular to the paper as far as possible to ensure that lines with uniform thickness can be drawn.
(2) The drawing sequence of needle-tube pen should be based on the principles of first up and then down, first left and then right, first bent and then straight, first thin and then thick, and the speed and strength of pen transportation should be uniform and stable.
(3) When drawing with a thick needle pen, there should be no pause in writing and pen collection.
(4) Needle pens can be used not only as straight lines, but also as circular arc lines or arcs connected by compasses.
(5) Use and maintain the needle-tube pen correctly at ordinary times to ensure that the needle-tube pen has a good working condition and a long service life. The needle-tube pen should be capped at any time when not in use, so as to avoid the ink at the needle tip drying up. The needle-tube pen should be cleaned regularly to keep the pen tip smooth.