EK232 0.2 Drawing Pen Black. Artline drawing system pens are a professional pen for technical drawing, illustration & graphic design. The pens contain a water based pigment ink that is acid & Xylene free which is also highly water resistant and fade proof. A friction proof nib enables Artline drawing pens to provide a consistent line width. It is protected with a metal reinforced collar for added strength. This also allows the pen to be used with rulers and stencils without causing any damage to the nib.