Ink Quality: The pen uses indelible black pigment ink that is water-resistant, lightfast, and acid-free, making it suitable for archival purposes.
Design: It features a long metal-clad tip, which is designed for use with rulers and templates, allowing for precise lines and accuracy in drawing.
Erasable on Drafting Paper: The ink can be erased when used on specific drafting papers, providing flexibility in correction without permanent markings.
Dry Safe: The pen can be left uncapped for up to 18 hours without drying out, ensuring reliability during extended use.