Regular listeners of my podcast, Stationery Adjacent, will know that I used to write all about my fascination with fancy pens on my now-defunct blog, Write Experience. And, as a recovering stationery blogger, I continually find neat pens, paper and ink that I’ve collected and stashed around my house - often in one of my vintage roll-top desks, many drawers (36 drawers, not including the built-in cubbies).
I was organizing some stuff the other day and found a long-lost Pilot G-Tec-C4 (known in other markets as the Hi-Tec-C for reasons unknown). This pen has languished in a drawer for at least 5 years, so this isn’t a cutting-edge, new product review. However, as I uncapped it and wrote with it, ink flowing straight out of the drawer, I was amazed by the quality of the writing experience, which I’m not sure I ever gave it’s due before.
So what is the Pilot G-Tec-C4? In case you can’t tell by its catchy marketing name, it’s an ultra-fine rollerball pen in a crystal-clear barrel. It’s what my cohost, Stu Lennon, would call a hypodermic needle, as the tip is only 0.4mm wide, which results in a written line of only 0.2mm. This is not a signature pen - flowy writing flourishes will not be your friend with this pen. But the bio-polymer ink, which is apparently made from a resin using a micro-organism similar to yeast, flows exceedingly well. Info courtesy of Cultpens
I don’t know exactly what “micro-organism ink” means, and I’m not sure I care enough to dig down a Google rabbit hole, but what I can say is that this ink does not evaporate in the pen barrel, even after 5-plus years of living in a desk drawer. For a micro-tipped pen, the ink flow is quite amazing. The tip glides on the paper, or at least it does if you have a soft-pressure writing style like mine.
The ink starts right away, as soon as the pen touches paper, which is a pet peeve of mine with many ball-point pens. And the flow continues uninterrupted while the tip touches paper. Unlike those awful blobs that accumulate at the tip of some pens, this pen just puts down a perfect line.
Dry time is pretty solid as well. In testing, I can generate a very small smudge by rubbing the ink for 1-2 seconds after writing a line, usually just at the start and stop of the line, which I guess is slightly thicker. After 2 seconds, it’s completely dry. I think this solid dry time would make this ink perfect for lefties, or anyone using less-than-quality paper.
I tried this in my William Hannah planner, which requires the use of blotting paper with any fountain pen, even my Japanese fine-nibbed, and this created solid, dry lines.
My pen is black-inked, which is one of my least favourite colours for writing. Other colours are available, and likely somewhere else buried in the desk-of-many-drawers. But the black is a solid performer and looks great on the page.
The micro-organism doesn’t like highlighters, as a little smudging does occur, but it’s not terrible. But, something to think about.
I see that these are currently available on Amazon and at many big-box stationery stores. I already have a 5-pack in my cart in different colours, as I’m that impressed with this little pen.
It’s a basic, crystal-clear barrel, which means it’s made of clear plastic. The barrel is quite thin - think about the size of a Bic Crystal. For most people, this will be fine, if not the most comfortable, for long periods of writing. I have quite large hands, and it’s a little on the thin side. I can see that if I were trying to write the next great Canadian saga by hand, this would get uncomfortable for me. But for a page or two of journalling, I’d definitely recommend it.
Solid pen. And a surprise at just how much I love it. For now, it’s displaced some high-end, gold-nibbed fountain pens in my daily rotation. Which says a lot.


