Pasler Underglaze Pen — Black Ceramic Marker for Bisque, Soft-Tip, Water-Based, Low–Mid Fire

The Pasler Underglaze Pen is a soft-tip, water-based ceramic marker designed to draw, blend, and fire directly on pottery bisque for crisp, durable underglaze lines.

Whether you're decorating greenware before glazing or adding fine details to bisque pieces, this black underglaze marker offers smooth application, quick drying, and the option to fire under a clear glaze for dishwasher-safe results. Its blendable opaque formula and rinseable tip make it practical for studio use, while the specified firing range lets you integrate it into low- to mid-fire workflows.

How does the soft tip perform on pottery bisque?

The soft tapered tip glides across porous bisque, producing consistent lines without digging or snagging. It’s forgiving for sketching freehand details or filling small areas, and the tip retains shape when rinsed and cared for.

• Soft tip for smooth, controlled strokes
• Good for both thin lines and light shading
• Rinseable tip extends marker life

Will the underglaze survive firing and glazing?

This marker uses a water-based opaque underglaze formulated to be fired directly or covered with a clear glaze. It matures across a broad range of temperatures commonly used in studios, so your designs will remain visible and stable after firing.

• Fire directly or apply a clear glaze before firing
• Firing range: Cone 05 (1046°C) to Cone 6 (1222°C)
• Appropriate for standard low- to mid-fire cycles

How do I maintain the marker for consistent results?

Keep the tip clean by rinsing with water after use to prevent clogging and preserve its shape. Store capped and upright if possible; occasional gentle agitation will help if the pigment settles.

• Rinse tip with water to clear pigment buildup
• Recap securely to prevent drying out
• Shake gently before use if separation occurs

What kinds of projects are best suited to this underglaze pen?

It’s ideal for detailed surface decoration—outlining, lettering, fine patterns, and small fills—on pottery bisque and greenware. Because the formula is blendable and quick-drying, it supports layered techniques and mixed-media approaches in ceramics.

• Lettering and fine linework on mugs, plates, tiles
• Small illustrations and patterning on bisque
• Touch-ups and mixed-media ceramic pieces

Who is this for: Ceramic artists, hobbyists, teachers, and studio professionals who want a reliable, easy-to-control underglaze marker for detailed bisque decoration. It’s especially useful for makers seeking a washable tip, an opaque black that fires well, and compatibility with common glazing schedules. Pasler backs the product with a satisfaction guarantee, so you can test it risk-free as part of your creative toolkit.