Uni-Ball, a century-old technological expertise
As the forerunner and originator of many great innovations in the writing and creative design market, Uni Mitsubishi Pencil has always strived to improve and maximise the comfort and experience of its users. A leader in the development of inks and technologies, the company was, among other things, the first manufacturer in the world to replace the rollerball tips with a metal tip.
Leader in the development of inks and technologies
Today, despite the trivialization of writing articles, Uni Mitsubishi Pencil continues its constant search for new concepts, both in the inks and in the technologies used at the heart of writing and drawing instruments.
At the Group's headquarters in Tokyo, 250 engineers work daily to improve the user experience and invent the writing and drawing instruments of tomorrow.
Our patented tips and technologies
Whether it is in the tips, leads, refills, ink flow or writing fluidity,
Uni Mitsubishi Pencil is committed to providing its users with high-performance tools at the cutting edge of technology.
Uni-flow flow regulation
The Uni-flow vane mechanism on all Uni-Ball liquid ink rollers regulates the flow of ink from the reservoir to the pen tip. It guarantees smooth and continuous writing down to the last drop of ink, and ensures that each rewrite is immediate and clean.
Because of its composition, gel ink is not very fluid and therefore usually less agreeable to use than liquid ink. To overcome this disadvantage, Uni Mitsubishi Pencil has developed the exclusive "twin-ball" system, which optimises the ink's behaviour at the tip.
When the ink reaches the tip of the pen, its viscosity is mechanically reduced by the twin-ball system. Then, as soon as the ink touches the paper, it returns to its original viscosity and clings perfectly to the cellulose. The writing is therefore both clean and smooth.
And because the flow is perfectly controlled, this technology also significantly increases writing time.
All Uni-Ball gel ink rollerballs, as well as the rollerballs using JETSTREAM technology, are equipped with it.
After several years of research, Uni Mitsubishi Pencil patented a technology in 2001 that compensates for rapid changes in atmospheric pressure, which are very often the cause of ink leakage.
Thanks to a hermetically sealed reservoir and tip, the Uni-Ball VISION ELITE Rollerball can be used with confidence at high altitudes and on airplane trips, without worrying about pressure changes in the cabin.
*Without risk in the airplane
Auto-retract by clip
A simple, yet extraordinarily effective mechanism!
When you put your pen back in your pocket or on a notebook using its clip, the tip of the pen retracts automatically. No more accidental ink stains in your pocket or on your document.
Our Uni-Ball GEL IMPACT RT gel rollerball is equipped with this clever and practical system.
Writing on AIR cushion
Several years of research have enabled Uni Mitsubishi Pencil to develop a revolutionary rollerball with a fountain pen-like writing feel, the Uni-Ball AIR.
Ideal for anyone looking for stylish and fluid writing, its technological secret lies in its writing ball surrounded by soft acetal-plastic instead of metal.
The benefits are numerous: reducing the intensity of friction with the page, allowing the pen to write from virtually any angle, making it possible to write with full and half strokes depending on the pressure exerted.
The Uni-Ball AIR rollerball, with its futuristic design, adapts to every type of writing. More precisely, it reveals it!
Transparent pressurised refills*
Traditional ballpoint pens use gravity to bring the ink to the tip, making it impossible to write at an upward angle. More significantly, it is not rare to see them leaking a few minutes or hours after attempting an unconventional use.
To prevent this, Uni Mitsubishi Pencil R&D has created a unique, lightly pressurised* sealed refill that allows writing in extreme conditions without the risk of pen failure, either during or after use. Thanks to the slight compression of the air inside the cartridge, the ink flow is uniform whatever the conditions of use. The Uni POWER TANK ballpoint pen was developed to accommodate this pressurised refill. It can write on walls, ceilings, wet paper, in the rain or at temperatures as low as -20°C
*The pressure is very low, so the pen presents no risk or restriction in use.
Kuru toga engine
The history of Uni Mitsubishi Pencil began in the 19th century with the manufacture of wooden pencils. In 1961, the group developed its first automatic mechanical pencil. In 2008, a new global innovation was introduced to the market: a mechanical pencil with automatic lead rotation, which keeps the lead tip always sharp and precise.
With a conventional mechanical pencil, the lead wears on one side during writing and the line becomes progressively less regular and coarser. The KURU TOGA technology solves this problem with its rotation mechanism: a spring clutch turns the lead a third of a circle each time the pencil touches the paper. This unique, patented innovation ensures even wear and tear on the lead, so that the tip is always perfectly bullet-shaped.
NANO DIA leads
The Uni Mitsubishi Pencil teams have developed a new generation of very high density leads, using the benefits of nanotechnology: NanoDia leads. Thanks to the inclusion of millions of nanodiamonds, they offer exceptional resistance (they are 22% more resistant to breakage than traditional leads) while retaining a great smoothness of writing. The lines are also darker and smoother.
NanoDia leads are used in all Mitsubishi Pencil Uni mechanical pencils. They are compatible with the other mechanical pencils on the market.