A channel inside the technical pen ensures optimum pressure equalisation

• At the same time, a movable drop weight controls the steady flow of drawing ink onto the paper via a tube located at the tip of the pen

• This results in a consistent line width which is determined by the diameter of the tube

• Drawing ink is an aqueous liquid to which colour pigments are added, primarily black soot

• Drawing ink is waterproof, lightfast and has excellent reproduction qualities

• Black twin media drawing ink

• Jet black for well-defined lines

• For use on drafting and tracing paper and matt drafting film

• Bottle content approximately 22ml