How to Use Rotring Isograph Pen for the First Time

The Rotring Isograph comes with a refillable cartridge and 2 disposable cartridges. In this video I am demonstrating how to mount the disposable cartridge into the pen. Rotring Isograph is useful for urban sketching, architectural drawing and ink and watercolor sketching Materials used: Pen for drawing: Rotring Isograph Pen 0.7 mm Black Ink Places you can find me #Isograph