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