Best Smudge-Free Pens for Highlighting Over Your Notes

Introduction

If you are a Japanese stationery fan, chances are you have a set of Zebra Mildliners lying around. They are beautiful, and they deserve to be used for their function, not just admired in a drawer. But regular Mildliner users know their reputation: they are notorious for smudging gel inks.

The good news is that some writing instruments pair with Mildliners and brush pens without smearing at all. Here are our favorite smudge-resistant picks, from everyday ballpoints to waterproof brush pens.

How We Tested

To bring you these recommendations, we tested each pick on one of our favorite papers: Kokuyo Campus Sarasara Loose Leaf. We waited about fifteen seconds for the ink to appear dry before highlighting, then tested a second time after fifteen minutes.

Your mileage may vary depending on your paper, how much pressure you apply while writing or highlighting, and other factors. A few habits help regardless of the pen. First, give your writing time to dry. In some cases you can highlight immediately, but we suggest waiting fifteen minutes for water-based inks like those in gel and rollerball pens. Second, use the finest tip size you can: a finer tip puts less ink on the page, so it dries and becomes smear-resistant faster. Stick with tip sizes of 0.5 millimeters or smaller. If you love a specific gel pen, you can also try highlighting first and writing over it.

Top Choice: Uni Jetstream

If you want to highlight your notes right away, a ballpoint pen like the Uni Jetstream is the best option. Ballpoint ink dries quickly and is oil-based, so it will not react to water-based highlighters like the Mildliner. We are big fans of the Jetstream because its low-viscosity ink flows so smoothly you might confuse it for a gel pen.

Gel Pen: Zebra Sarasa Mark On

The Zebra Sarasa Mark On uses a specially formulated ink that can be highlighted almost immediately. After just five seconds, its ink is nearly smudge-free. The Mark On’s ink has greater water resistance and adheres to the page better than other gel inks, which also means a spilled water bottle will not ruin your carefully crafted notes.

Colorful Gel Pen: Pentel EnerGel

Color-coding enthusiasts may not want to stop at highlighting, so a handful of colorful gel pens like the Pentel EnerGel are a must. The EnerGel’s vibrant ink resists smearing when paired with Mildliners, so if you want to highlight teal text written in red ink, go for it. We also recommend the EnerGel for left-handed writers because the ink dries quickly.

Rollerball Pen: Uni-ball Eye

You might not expect a rollerball pen’s liquid ink to resist smearing, but the Uni-ball Eye is more than up to the task. In our tests, we could highlight over its writing in seconds. Writers who experience hand cramps from pressing down too hard will also appreciate the Eye’s free-flowing ink, which needs only a light touch to produce dark lines.

Fineliner: Deleter Neopiko Line 3 Pen

The Deleter Neopiko Line 3 Pen uses a waterproof, pigment-based ink that can be highlighted in under five seconds. As an added bonus, it comes in tip sizes as small as 0.03 millimeters and as broad as 2 millimeters, so you can cram notes into margins, create bold headers, and everything in between.

Brush Pen: Tombow Fudenosuke Brush Pen

The Tombow Fudenosuke Brush Pen is beloved by calligraphers thanks to its bouncy yet easy-to-control tip, and its water-resistant ink will not smudge when used with highlighters. Calligraphy beginners can try the hard tip, while those with plenty of experience in line variation can pick up the soft tip. One note: the color versions of the Fudenosuke will not resist highlighting as well as the black ink versions.

Fountain Pen Ink: Platinum Carbon Ink and the LAMY Safari

Fountain pen enthusiasts can still use their favorite pens with Mildliners thanks to Platinum Carbon Ink. If you want to highlight your writing as quickly as possible, use extra fine and fine nibs. We tested a fine LAMY Safari and found that writing could be highlighted after ten minutes with no smudging at all.

The Highlighter That Started It All: Zebra Mildliners

None of this works without the star of the show. The Zebra Mildliners’ soft pastel shades are what make color-coded notes so appealing, and the right pen pairing removes the one big drawback. Once your pen does not smear, there is no reason to leave them sitting in a drawer.

Buying Advice

If you highlight immediately after writing, choose an oil-based ballpoint like the Jetstream or a quick-drying gel like the Sarasa Mark On. If you color-code heavily, the EnerGel offers the widest palette. For expressive writing and headers, the Neopiko Line 3 and Fudenosuke cover fineliner and brush calligraphy needs, while fountain pen users should pair fine nibs with Platinum Carbon Ink. Whatever you choose, fine tips and a little drying time go a long way.

Conclusion

Smudged notes are not a Mildliner problem, they are a pairing problem. Match your highlighter to a fast-drying, water-resistant, or oil-based pen and you can use your Mildliners for everything they were made for. Just do not let them sit in the drawer.