Rotring drawing ink black for isograph/Variant pens, 23 ml

This Rotring drawing ink gives your Isograph or Variant pen exactly the smooth, opaque black line you need for crisp technical drawings.⁠‌‌‌‍‌‌‌‌‌‍‌‍‌‍‌‍‌‍‌‌‍‍‍‍‍‍‍‌‍‌‌‍‍‌‌‌‍‌‍‌⁠ With 23 ml you have ample supply for long drawing sessions without any hassle.⁠‌‌‌‍‌‌‌‌‌‍‌‍‌‍‌‍‌‍‌‌‍‍‍‍‍‍‍‌‍‌‌‍‍‌‌‌‍‌‍‌⁠

What does drawing ink do, and when do you need it?
Drawing ink is the special ink you need for your technical drawings and precision work. This black ink produces clear, durable lines for professional drawing, architectural sketches and technical illustrations.

Why specifically for isograph and Variant pens?
This rotring drawing ink has been developed for use in isograph and Variant pens from the same brand. The composition is precisely matched to the internal system of these technical pens, so you can be sure of optimal ink flow and consistent line width.

What does the 23 ml capacity mean for your work?
With 23 ml of drawing ink you can complete a considerable amount of drawing before you need new ink. This quantity is practical for regular users who don't want to top up constantly, but also don't want to keep too much stock on hand.

Practical tip for refilling
Make sure your pen is completely clean before adding new ink. Only use this specific rotring ink in your isograph or Variant pens to prevent blockages. Store the ink at room temperature and always close the bottle tightly to prevent it from drying out.