Suck UK CMYK Pen Review: Four Inks, One Pen, Endless Color Mixing

Introduction

The idea behind the Suck UK CMYK pen is instantly appealing: one pen body holding four ink cartridges, cyan, magenta, yellow, and black, so you can draw and mix colors on paper the way a printer does. It is the kind of supply that turns a sketchbook session into a small color experiment, and it is sold with mixing suggestions printed right on the packaging, such as 50% magenta and 50% yellow producing orange, or an even three-way split of cyan, magenta, and yellow giving a darker rainbow effect.

After spending a full session with it in a Stillman and Burn Zeta series sketchbook, doodling everything from a frog to a maple leaf to a little pumpkin, the verdict is mixed. The concept is genuinely fun and nostalgic, but the pen itself has real shortcomings worth understanding before you buy.

First Impressions and Design

The packaging is well done. It includes printed color-mixing ideas that make the pen feel like a mini lesson in subtractive color, which is a nice touch for anyone who wants to think about how colors relate to one another. The magenta and cyan inks deploy by sliding a selector, while the black uses a separate pull-down piece.

The pen body itself is where the excitement dips. It feels cheap, with hardly any weight to it, and for the price it feels like the structure could have been more solid. Pressing too hard can also shoot the ink cartridge back up into the barrel, and the nib is easier to lose than on similar multi-ink pens from years past.

Drawing With It: Mixing Colors on Paper

In use, the four inks behave very differently. Magenta is the star: it flows freely and consistently, and it is by far the most pleasant of the four to draw with. Yellow works reasonably well, though it produced the occasional glob on the paper. Black is inconsistent from the start, even on a brand-new pen. Cyan is the biggest disappointment, requiring real pressure to get any ink out, which then causes it to retract back into the barrel again and again.

Layering is where the fun lives. Cross-hatching cyan over yellow eventually produces a convincing green, and it genuinely is satisfying to watch the mixture turn orange or settle into the shade you were aiming for. The catch is that it takes a lot of layers to get there, so expect a slower drawing process than a standard ballpoint.

Patience, Shading Style, and Who It Suits

This pen rewards a consistent shading style. Cross-hatching worked well for blocking in color, but circular, scribbly shading turned out to be the most rhythmic and enjoyable method of the session, and it produced some of the best-looking results.

If you enjoy sketching with pen and you have plenty of patience, there is real enjoyment to be found here. If you prefer quick, smooth, single-color sketching, the slow layered process can feel overwhelming rather than relaxing. The compact size does make it a practical travel option: one pen in a purse or carry-on gives you four color options without taking up space, though the slow ink flow works against you when you want to fill time efficiently.

Things to Consider Before Buying

The honest overall impression is that this feels somewhat gimmicky in execution. The nostalgic appeal is real, and the idea deserves credit, but the inconsistent ink flow, the cheap-feeling body, and the finicky cyan cartridge add friction to every page. Anyone who grew up with an eight- or ten-color cartridge pen may find this one a step down from those childhood versions.

There is also a fair argument that a handful of inexpensive individual ballpoint pens deliver a better drawing experience for less money and less frustration. Trying a supply like this still has value, though, because experimenting with unfamiliar tools grows your appreciation for artists who work in ink all the time. It genuinely builds respect for the patience pen art demands.

Buying Advice

Buy the Suck UK CMYK pen if the color-mixing concept excites you, you love nostalgic multi-ink pens, or you want a compact travel coloring option and do not mind working slowly for the result. It is best treated as a playful experiment rather than a daily driver.

Skip it if smooth ink flow, a solid pen body, and fast coverage matter most to you. In that case, a small set of affordable individual ballpoint pens will serve your sketchbook better and with far less fuss.

Conclusion

The CMYK pen is a cool concept with real charm: four inks, one body, and printed mixing guidance that makes you think about how colors build on each other. But the cheap-feeling construction, inconsistent ink delivery, and stubborn cyan cartridge hold it back from being an easy recommendation. Fun as a novelty and a color-mixing experiment, frustrating as a serious sketching tool.