Uniball Zento Gel Ink Rollerball Pens, 12 Black Medium Point Smooth Writing Pens, Colored Japanese Pens, Zen Colors

LDR: Super-smooth, quick-drying black gel ink in an aesthetically pleasing, comfortable, and environmentally conscious barrel. A top-tier choice for effortless, smudge-free writing. I recently purchased the 12-pack of Uniball Zento Gel Ink Rollerball Pens because I was in the market for a reliable, super-smooth pen for long-form note-taking and journaling. My initial impression was excellent: the sleek, minimalist design is immediately appealing, and the moment I put the pen to paper, the writing experience was noticeably superior. The "medium point" (0.7mm) combined with the new liquid gel ink formula promised an effortless glide, and it absolutely delivered. In real-world use, the Zento pens truly shine. They perform consistently without skipping, delivering a dark, uniform black line that makes handwriting look crisp and clean. The biggest standout feature is the ink's quick-drying property. As someone who writes fairly quickly, smearing is a constant issue with gel pens, but the Zento ink dries so fast that it's virtually smudge-resistant, which is a massive win. The seamless soft grip is comfortable and helps prevent hand fatigue during extended writing sessions. The barrel itself, made from 76% recycled material, adds an unexpected layer of satisfaction to the purchase. The only minor point of consideration is that the black ink, while dark and vivid, is sometimes described as slightly lighter than the deepest black of some other Uniball lines, but this is a very fine distinction. Pros Super-Smooth Writing: The liquid gel ink provides an effortless, non-scratchy writing experience. Quick-Drying Ink: Significantly reduces smudging and is excellent for fast writers and left-handers. Comfortable Grip/Design: The minimalist barrel with a seamless soft grip is comfortable for long-term use. Eco-Friendly Barrel: Made from 76% recycled plastic, aligning with environmental consciousness. Strong, Functional Clip: The spring-loaded wire clip is durable and easily attaches to notebooks or pockets. Cons Ink Blackness: Some users find the black ink, while very good, is not the absolute deepest shade of black compared to some other premium gel pens. Refill Availability/Compatibility: While the pen body is refillable (often taking other Uniball refills), the specific Zento refill may not be as universally available as others. Verdict The Uniball Zento Gel Ink Rollerball Pen is an absolute winner and easily warrants a 5-star rating. It is best for anyone who values a remarkably smooth, quick-drying, and consistent writing experience for everyday use, professional work, or intensive note-taking. If you've been looking for a reliable, smudge-free pen that is both aesthetically pleasing and comfortable to hold, the Zento is well worth the price.

These pens are great, very functional! They write very smoothly and they have very good visibility. I like their design it's very sleek and modern and the texture is nice. Also I really enjoy the moveable clip. Overall a very durable smooth flowing pen.

I love these pens! They ink flows right away, and the pens feels great to hold. The plastic feel very nice and smooth to the touch. Quality of the pen overall feels good. I also love the metal paperclip style clip on these pens—it's a perfect design choice. I only hope that Uniball (Mitsubishi) continues to make these for years to come. Two thumbs up! My only con is that someone the ink can blot occasionally, if I my writing isn't even and deliberate—but it happens seldomly. Ink flow is not perfect persé but its absolutely better over other brands I've used with the same quality category.

Works very well looks cool feels quality and feels good in the hand and it’s just a good product and does its job well.

Very smooth writing pen, with a comfortable grip.

Smooth, clean, and pretty. What more could you need. They write smoothly without skipping or scratching. They have such a lovely look and feel. The pen clip doesn't break easily. They're comparable to the coveted Tul pens. I really enjoy writing with them.

I highly recommend these as my mom and I are pen connoisseurs. They write very smoothly and never skip. Ink flow is also very consistent! I also like the clip as it stays on shirts and doesn’t snag. If you’re somebody who carries pens with you and want easy on and off clothing, get these pens!!

Wanted to share in case anyone is curious to know as I was. I could not tell by the pictures Amazon has posted for the Zen Collection what the true color was for the darkest pen. For reference (hope you're able to tell the difference between the colors in the photos I've posted), the top pen is the COASTAL (from the MUTED set) and the bottom is the INDIGO (from the Zen set). The names of the other barrel colors in the Zen collection are CLOUD (grey), SEA (a very light blue), and SNOW (white). I'd also like to note that the colors in the photos for the Zen Collection that Amazon has posted are coming across darker than how they actually appear in person. Love the texturized grip section of the barrel. The ink is dark, saturated. I recommend these pens!