Uni-Ball UM 153 Signo Broad Point Gel Pen - White - Pack of 3 Review (2026)

What broad point white gel ink is good for

This pack contains three Uni-Ball UM-153 Signo pens with a 1.0mm conical metal tip that lays down roughly a 0.6mm line of opaque white pigmented gel ink. Because the ink is pigment-based rather than dye-based, it sits on top of dark paper as a solid, bright white rather than sinking in and looking gray or translucent, which is the main reason this pen shows up repeatedly in lettering and journaling recommendations for dark backgrounds. The broad tip suits bold lettering strokes, highlight dots, star fields, and any faux calligraphy technique where a thick downstroke needs strong, visible contrast.

Build and ink properties

Each pen has a crystal-clear acrylic barrel with a rubberized grip and a snap cap, and measures about 13.9cm long, a fairly standard gel pen size that fits most pen cases and rolls without much risk of it drying out if capped properly between uses. The ink itself is described as waterproof, light-fast and acid-free once dry, properties that matter for lettering meant to last in a journal, scrapbook or archival card rather than fade or smear over time. Despite the broad line width, the ink is formulated to dry with reasonable speed, and the pen delivers a smooth, consistent flow without the skipping that cheaper white gel pens are known for.

Where the broad tip runs into limits

A 1.0mm tip that lays down a roughly 0.6mm line is intentionally thick, and that makes it a poor choice for fine detail, small lettering, or delicate line work where a 0.3mm or 0.5mm point would be more appropriate. Letterers who want both bold highlights and precise detail typically pair this broad pen with a finer white gel pen for outlining or small text, using the broad pen only for the thick downstrokes or accent marks. Because white gel pens in general can be pricier than a basic black pen, some buyers weigh cost against how often they actually work on dark paper before committing to a full set.

How it compares with other white pens

Sakura's Gelly Roll Basic White set of 3 covers assorted tip sizes rather than one fixed broad point, giving more flexibility across detail and bold work in a single set. Uni-Ball's own Signo Gel Impact version offers a similar broad white line in a different barrel style, while budget options like PANDAFLY or Art-n-Fly extra fine pens target the opposite end of the spectrum, fine detail rather than bold strokes. ARTEZA's 12-pen set spreads the cost across more pens but does not match the specific opacity and reliability that has made the Signo Broad line a long-standing favorite among letterers working on black paper.

Verdict and who should choose a different tip

At our score of 8.9 out of 10, this pack is a dependable choice for anyone doing bold white lettering, highlights or faux calligraphy on dark paper, backed by genuinely opaque, archival-quality ink. Choose it if your projects lean toward thick, high-contrast strokes on black or colored cardstock. Look elsewhere, toward a fine point white gel pen or an assorted-tip set like the Sakura Gelly Roll, if your work depends on small text or delicate detail, since a 1.0mm broad tip will not deliver that kind of precision.

Frequently asked questions