Ballpoint Pen - 0.28mm - Jetstream Edge

When the Jetstream Edge launched, the 0.28mm ball diameter was the smallest ever achieved in an oil-based ballpoint pen.

A summary of its features:

• 0.28mm produces a line that sits closer to a fine-liner or technical pen than to a conventional ballpoint. It means characters stay sharp in small handwriting and annotations don't bleed into margins.
• The ink used is Jetstream's low-viscosity oil-based formula, which is water-resistant, fade-resistant, and forgery-resistant, combining smoothness and clean lines with rich, dark colour. It dries quickly enough to avoid smearing and has none of the skipping or blobbing associated with conventional ballpoint ink at fine tip sizes.
• The Point Tip has a slim, narrow shape that allows you to see the tip clearly even when performing fine writing work.
• The metal grip with linear grooves extends the pen's visual length and offers a firm, stable hold. The entire body tapers towards the tail, visualising the pen's low centre of gravity. The hexagonal shaft prevents rolling and gives the pen a purposeful, tool-like quality in the hand.
• Weight is distributed toward the nib - where it is needed for fine work.

Specifications:

• Tip: 0.28mm ball, brass with aluminium grip, Point Tip design
• Ink: Jetstream low-viscosity oil-based, black
• Shaft: ABS resin, hexagonal, black
• Clip: Stainless steel
• Refillable: Yes, compatible with SXR-203-28 refill
• Origin: Made in Japan

Care instructions

Retract nib when not in use. Store horizontally or nib-down, as extended nib-up storage may cause the ink to recede from the tip. Do not expose to extreme heat.

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MITSUBISHI PENCIL CO., LTD. is a Tokyo-based writing instruments company with no connection to the Mitsubishi industrial conglomerate. Mitsubishi Pencil registered its three-diamond trademark in 1903, ten years before the Mitsubishi industrial group registered theirs. The three diamonds is a family crest, and the company's claim to it predates the name it is more commonly associated with.

The company was founded in 1887 by Niroku Masaki, inspired by Western pencils he first encountered at the 1878 Paris World Fair. It began as the Masaki Pencil Manufacturing Company in Shinjuku, Tokyo, and was renamed Mitsubishi Pencil Co., Ltd. in 1952. In 1958 it launched the *uni* pencil - named for "unique" and the French word for "smooth," with a logotype designed to be "a house that warmly wraps people up."

The *uni* brand became the company's corporate identity and today appears on the full range of its products. Mitsubishi Pencil launched Japan's first ballpoint pen in 1959, and has continued to set ballpoint benchmarks ever since - among them the Jetstream ink system, which became one of the world's best-selling ballpoint formulations, and the Jetstream Edge, which pushed the technology to its present limit. In 2024 the company acquired the German writing instrument brand Lamy, extending a global presence that now spans over 100 countries.