Refill for Uni Mitsubishi Pencil ballpoint pen SXR-72, blue ink, compatible with SX-101

Refill for Uni Mitsubishi Pencil ballpoint pen SXR-72 in blue ink is a direct replacement refill designed to restore writing functionality in compatible pen housings such as the SX-101. The cartridge contains a precision-engineered tip and dye-based blue ink formulated for consistent flow, suitable for everyday note-taking, form filling and general office or school writing tasks.

Advantages

This SXR-72 refill provides a reliable and even ink delivery to minimize skipping and blotting. The precision tip supports consistent line width for clear legibility, while the refill format makes it easy to replace spent cartridges without changing the entire pen. The blue ink is formulated for quick drying on typical office papers to reduce smudging during normal use.

Suitable for

• Replacing empty refills in compatible ballpoint pen housings (for example SX-101 style pens)
• Everyday office, school and home writing tasks
• Filling forms, taking notes and annotating documents

Key specifications

• Ink colour: blue
• Refill model: SXR-72 compatible design
• Tip type: precision ballpoint tip for consistent line width
• Ink type: dye-based ballpoint ink with standard drying properties
• Form factor: replaceable pen cartridge compatible with SX-101 style housings

How to use

To replace the refill, disassemble the compatible pen housing according to its design, remove the spent cartridge and insert the SXR-72 refill until it seats securely. Reassemble the pen and test on scrap paper to confirm proper ink flow. Store spare refills in a cool, dry place away from direct sunlight and extreme temperatures to maintain ink stability.

Usage recommendations

For best results use on standard office paper and allow a second for drying to reduce smudging. If ink flow is uneven after installation, try gently priming the tip by making a few short strokes on scrap paper; avoid pressing excessively to prevent tip damage.