Permanent marker Donau D-Signer U round tip 2–4 mm line, black

Donau D-Signer U permanent marker with a round tip produces a 2–4 mm black line suitable for a wide range of everyday marking tasks. The marker is formulated to deliver consistent ink flow and quick-drying, fade-resistant strokes on paper, cardboard and many other common surfaces. Its round nib balances line width and control, making it practical for office use, warehouse labeling and packaging identification where legibility and durability are required.

Advantages

The marker offers a stable, continuous ink supply that reduces skipping and ensures uniform lines. The 2–4 mm round tip provides both bold visibility and moderate precision, while the permanent black ink resists fading and smudging after drying. The design is intended for reliable, general-purpose marking across multiple surfaces with minimal maintenance.

Suitable for

• Labeling boxes and cartons in warehouses
• Writing on paper and cardboard
• Marking packaging and shipping information
• Office and general-purpose identification tasks

Key specifications

• Tip shape: round
• Line width: 2–4 mm
• Ink color: black
• Ink type: permanent, quick-drying, fade-resistant
• Recommended surfaces: paper, cardboard and many other porous and non-porous materials

How to use

Remove the cap and shake the marker briefly if recommended by the manufacturer to ensure even ink distribution. Hold the marker at a comfortable angle and apply steady pressure to produce a 2–4 mm line; lighter pressure yields thinner strokes while firmer pressure increases ink flow and line width. Replace the cap securely after use to prevent drying. Test on an inconspicuous area when marking unfamiliar surfaces to confirm adhesion and permanence.

Usage recommendations

Store horizontally or with the tip down to help maintain consistent ink flow. Avoid prolonged exposure to direct sunlight and extreme temperatures to preserve ink performance. For archival or critical applications, allow ink to dry fully and verify compatibility with the target surface before large-scale application.