Ballpoint pen refill Trodat Uni SXR-7 red — compatible refill for retractable pens, SXR-7 ink cartridge

Trodat Uni SXR-7 red is a ballpoint pen refill designed for compatible retractable pens. It uses the standard SXR-7/Uni cartridge in red ink and is intended for everyday writing tasks such as note taking, filling forms and other office or home uses. The refill enables a quick replacement to restore a retractable pen's functionality without replacing the entire pen body.

Advantages

This refill provides consistent red ink flow and compatibility with pens that accept SXR-7/Uni refills. Its construction follows common SXR-7 dimensions to fit retractable housings and deliver reliable writing performance for routine tasks. Using a refill extends the service life of compatible pens and reduces waste compared with discarding the whole instrument.

Suitable for

• Everyday office writing and note-taking
• Filling forms and marking documents in red
• Home administration and schoolwork that require a red ballpoint
• Replacing empty SXR-7 compatible refills in retractable pens

Key specifications

• Ink colour: red
• Refill type: SXR-7 / Uni-style ballpoint cartridge
• Intended use: retractable pens that accept SXR-7 format refills
• Writing style: ballpoint (oil-based ink)

How to use

Remove the empty refill from the retractable pen according to the pen manufacturer's instructions, typically by twisting or pulling apart the pen housing. Insert the Trodat Uni SXR-7 red refill into the pen body, ensuring the tip and spring (if present) are positioned correctly for the mechanism to operate. Reassemble the pen and test on scrap paper to confirm smooth ink flow before regular use. Store spare refills horizontally or capped in a dry place to preserve ink quality.

Usage recommendations

For consistent results, use this refill in pens explicitly specified to accept SXR-7/Uni cartridges. Avoid exposing the refill to extreme temperatures or prolonged direct sunlight to prevent ink thickening or drying. If skipping long periods between uses, test the refill briefly on paper to re-establish flow before writing important documents.