Rotring Isograph Technical Pen Ink, 23 ml, Red

Technical pen ink for refilling a rOtring Isograph — supplied in a 23 ml bottle with a dropper built into the cap.

Isograph pens ship empty, so a bottle is not an accessory here — it is what makes the pen work. The ink is lightfast, fast-drying and waterproof once dry, which means you can wash colour over a finished drawing without the linework moving.

• 23 ml bottle — refills an Isograph many times over
• Lightfast, fast-drying and waterproof once dry
• Isograph pens are sold without ink — you will need this