The Uni-Pin Fine Line Drawing Pen range offers consistent, controlled pigment ink lines for technical drawing, illustration, manga and architectural sketching. Each wallet set groups an assortment of nib sizes to give artists immediate access to line weight variation across a single drawing session. Waterproof, bleed-resistant ink works directly under watercolour and marker washes without lifting or spreading.

Product features:

• Pigment-based ink, waterproof and fade-resistant once dry.
• Compatible with watercolour, marker and mixed media layering without bleed-through.
• Fine, durable plastic nib engineered for consistent line width from first use to last.
• Each set includes an assortment of nib sizes for full line weight range within a single session.
• Available in three wallet configurations: 6 Pens Black, 6 Pens Grey/Black, and 3 Pens Sepia/Black.
• Acid-free ink safe for use on archival and conservation-grade work.

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