Mitsubishi uni-ball Signo bit: A Review

The Mitsubishi uni-ball Signo bit is a very unique gel pen in that it is touted as the worlds smallest point gel pen. At 0.18mm with a 0.13mm footprint it most certainly is the worlds smallest. About the only thing I can compare it to would be a 0.13mm technical pen. However the bit is a true roller ball while the technical pen is not. The technical pen has a stainless steel outer tube and an inner wire rod. As the point is pressed against the paper the inner rod is forced up and ink flows down. With the bit ink flows through the hollow tube and is picked up by the ball and is deposited on the paper. This makes the bit write smoother than the technical pen. In fact the bit is smoother than some broader fine point roller balls. The needlepoint is made in such a way that it is stronger than the Pilot Hi-Tec-C 0.25mm yet writes smoother. The ink is specially formulated for the fine point so that if flows smoothly allowing the bit to write as well as it does.

The bit I tested was one with a 0.18mm point in Light Blue though the bit is also made in 0.28mm and .7mm (according the manufacturer). I did not attempt to write on a grain of rice but I was able to write so small that I had to use a magnifying glass to do so. As mentioned above I found that the bit wrote smoother than the Pilot Hi-Tec-C 0.25mm as well as a few others despite its ultra fine point. The ink seems to flow smoothly once the initial stuttering of getting a new pen to write, common with many pens. After that each time that I put it to use it preformed admirably. No matter how slow or how fast that I wrote the bit seemed to keep pace. I print when I write so to test the bit's flow during cursive writing I signed my name with it several times. I write my signature quite quickly and the bit did not skip a beat. The Light Blue ink is a lovely color and not at all hard to read in such fine lines.

When I first heard of the Mitsubishi uni-ball Signo bit I was ecstatic. I wanted one as I am a fine point freak. I was sure that it was going to be a very scratchy pen and persnickety as well. It is neither. I am a semi-heavy handed writer but I strive to be as light a handed writer as possible and I can easily control the pressure that I apply to a pen. However the bit wrote well even when I applied heavy pressure, though it did feel 'scratchier' the heavier I pressed. You might think that with such a pen there would be limited uses. I don't feel that this is true. Anything you can do with any other similar pens you can do with the bit. With a black bit I once wrote 11 pages of data on notebook paper and the bit did just fine.

Over all I am impressed with the bit. It was an unexpected pleasure to write with. While personally I prefer to do my daily writing with a 0.38mm pen I have read where others have used the bit on a daily basis to take notes in school on 3' x 5" cards. If you have need of a pen that will write extremely fine of if you just like to write in fine lines then the bit is for you.

The bit comes in 14 beautiful colors which includes Black, Blue, Blue-Black, Emerald Green, Fuchsia, Light Blue, Light Purple, Lime Green, Mandarin Orange, Orange, Pink, Purple, Green and Sky Blue. All of these are available from our friends at JetPens.com who were kind enough to supply the Light Blue bit for this review.

(Photo courtesy of JetPens.com)