Oil-based Marker uni Mitsubishi Pencil PX21 blue — PX21N, single blue ink marker

The oil-based Marker uni Mitsubishi Pencil PX21 in blue is a single-color, compact marker designed for permanent marking on a variety of common surfaces. It delivers water-resistant, oil-based ink intended for clear, long-lasting lines suitable for labeling, technical notes and general-purpose marking. The slim format supports handheld use for everyday tasks where durable, visible marks are required.

Advantages

This PX21 oil-based marker produces consistent blue ink flow that resists smudging and fading from light and moisture. Its oil-based formulation adheres well to coated and uncoated papers, cardboard, plastic and metal surfaces, providing durable permanence. The compact, single-color design makes it convenient to carry and use for quick annotations and identification tasks.

Suitable for

• Labeling boxes, files and storage containers
• Writing on plastic, metal and glossy surfaces
• Technical notes, diagrams and workshop markings
• Packaging, shipping and inventory identification

Key specifications

• Ink type: oil-based, permanent
• Color: blue
• Form factor: handheld marker, single color
• Tip: standard rounded bullet-style tip for general marking (non-calligraphic)
• Finish: water-resistant and smear-resistant when dry

How to use

Remove the cap and press the tip gently to initiate ink flow if needed. Apply steady pressure and glide the marker across the surface to create clear, continuous lines. Allow the ink to dry fully before stacking or exposing to moisture. Replace the cap after use to prevent the tip from drying out.

Usage recommendations

Test the marker on an inconspicuous area when using on delicate or coated surfaces to ensure compatibility. Store horizontally or with the cap securely closed to preserve ink quality. For best results on non-porous surfaces, allow a longer drying time and avoid heavy abrasion.