uni-ball Signo DX Gel Pens Review: A Colorful Fine-Point Favorite With One Catch

Introduction

The uni-ball Signo DX has been a long-standing favorite in the fine-point gel pen world, especially among bullet journaling enthusiasts. This review looks at the 0.38 mm size in a set of 32 colors, originally purchased as a 20-pack and a 12-pack back in 2022. It remains one of the most recognizable fine-liner gel pens around, but it comes with some real trade-offs worth knowing about before you buy.

Who This Product Is For

The Signo DX suits anyone who writes small, uses fine-point pens daily, or works heavily in a bullet journal. The black 0.28 mm version has been a go-to everyday pen for many journalers since 2018, and the colored versions extend that appeal to planners, spreads, and color-coded notes. If you enjoy detailed layouts, doodles, and precise lines, this pen line was practically made for you.

At roughly $2 to $4 per pen, these are an accessible way to try out a wide color range without a big upfront commitment.

Design and Build

The pens use a clear plastic body that lets you see exactly how much ink is left, which is genuinely useful for a pen collection that grows quickly. Refills are available, but only for a few shades. The rubber grip is cushiony and comfortable for longer writing sessions.

The line comes in 0.28 mm, 0.38 mm, and 0.5 mm sizes, though the 0.38 mm size offers the largest range of colors by a clear margin.

Ink Performance

The ink is water resistant, fade resistant, and feather resistant. In testing, there is no bleeding and no ghosting, which is exactly what you want for thin journal paper.

However, consistency is a little hit or miss. Some shades write much smoother than others, and because these pens use such a fine needle point, some can feel noticeably scratchier than others. As a general pattern, the darker the pigment, the smoother the pen writes, while lighter colors tend to feel scratchier or drier.

Color Range

This is where the Signo DX shines. The range of vibrant colors is genuinely beautiful, and the 32-color lineup covers everything from deep saturated tones to soft pastels. For bullet journal spreads, color coding, or artistic lettering, few fine-point pens offer this much variety.

That said, given the inconsistency between inks, the lighter shades are the ones most likely to disappoint during everyday writing.

Things to Consider Before Buying

There are a few practical points to weigh before picking up a set:

• Availability has changed. The original multi-packs are harder to find, and the pens are now sold individually or in smaller packs.
• The line appears to be gradually phased out in favor of the uni-ball ONE gel pen line, which uses white bodies.
• Refill availability is limited to only a few shades.
• Light-colored inks write less smoothly than dark ones.

Buying Advice

For most buyers, the smartest approach is to focus on the darker ink shades, which write more smoothly and feel more consistent overall. The lighter shades are worth trying if pastel swatching or artistic coloring is your main use case, but keep expectations in check.

If you love the concept but want something more current, the newer uni-ball ONE line is worth a look, since it appears to be the direction the brand is heading.

Conclusion

The uni-ball Signo DX in 0.38 mm remains a beautiful and practical fine-point gel pen with an exceptional color range and impressively clean ink that resists bleeding, feathering, and fading. The main caveat is inconsistency: darker inks perform noticeably better than lighter ones, and the line is slowly being phased out. Stick to the darker shades and this is still one of the most reliable everyday journaling pens you can buy.