Uni Do! Posca Paint Marker White Extra Fine Review

I am on a quest in search for a white, waterproof pen that reliably lays down a thin, opaque line. You’d think that this wouldn’t be so hard to find, but this combination (opaque-and-thin-and-waterproof-and-reliable) has so far proven to be elusive. The closest so far has been the Uni-ball Signo Broad UMR-153 white gel ink pen, but it tends to dry out and blob, so it is far from perfect.

The Uni Do! Posca paint marker in white, extra fine (0.7) is a welcome addition to the white pen field. It’s waterproof, water-based (so not smelly like other paint markers), lightfast, and can be used on a multitude of surfaces. I’m going to focus its use on paper, but if you’re looking for a way to label a dark coloured object, this may be the pen for you.

The Do! Posca’s design is pretty well designed. The pen is narrow enough in diameter for you to comfortably use it like a regular pen, and the square cap keeps the pen from rolling off the table, and looks great. The pen body is much too busy for my liking, but that’s a minor quibble.

There’s a tiny metal ball inside the pen, and you need to shake it well before use to get the paint ink flowing. When you use the Do! Posca for the first time you need to prime it by shaking the pen thoroughly and then pressing the plastic tip in several times until the white paint flows. I had no problem getting the pen to start up after a good shake, but I’d recommend keeping it horizontally and cap it immediately after use.

The Uni Do! Posca doesn’t blob, and it’s excellent for small details. I wouldn’t use it to fill in large expanses of white, as it offers pretty poor coverage and doesn’t layer well. If you’re looking to use it for highlights, correction or detail work, this is the pen for you.

I drew this journal comic on a Clairefontaine Paint On Naturel A5 pad.

The Uni Do! Posca extra fine paint marker in white was available for a time at Jetpens, but now you can find it easily enough on eBay. If you’re looking for an opaque, extra fine, waterproof white pen, I highly recommend it.

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Uni Do! Posca Paint Marker White Extra Fine Review

Tombow Object Rollerball Review

In the early 2000s the Tombow Object fountain pen was one of the recommended beginner fountain pens on the market. That was in the pre-Pilot Metropolitan and pre-TWSBI days, when the beginner fountain pen choices were pretty sparse. I have the Tombow Object fountain pen and I’ll review it at a later time, but a few years ago I saw its rollerball counterpart on clearance sale, and so I risked the purchase.

I’m not a rollerball person, since they tend to behave like the worst of fountain pens (ink spreading, feathering, bleeding through and leaking out of the pen) without the good parts (line variation and versatility in ink colour). But the Tombow Object rollerball intrigued me because it shares the same body as the Tombow Object fountain pen but is significantly cheaper, and so I was hoping that even if it turned out to be an annoying pen to use, I could just use it as a way to get some colour variety with my Object fountain pen.

And why would you want that, you ask? Well, just look at that anodization:

The hairline on the body is just a smudged drop of ink. 

The Tombow Object is a metal bodied pen (brushed aluminum body and cap that gives it a great texture) with a plastic section and a steel clip. That gives it some heft, but still keeps it light enough to be comfortable to use both capped and uncapped. There’s a satisfying snap when you cap the pen, and it stays on very securely. The tip doesn’t rattle or wiggle around, and the clip does an admirable job of being a good pocket clip and preventing the pen from rolling about. The pen has a beautifully designed taper on both ends that gives it a bit of character, and an unobtrusive “Tombow” and “Japan” printed in white on the cap. Although this colour is called gold, it’s a coppery-gold, close to a champaign colour you can sometimes see on cars.

The appeal of the Tombow Object has always been the fantastic anodization colours that were offered, each one really vibrant (except for the silver, which was boring). As you can see from the photo above, like all aluminum pens, it can be dented and nicked. This is probably a pen that you want to keep on your desk and not bashing around in your bag or pocket.

Another reason to keep this pen on your desk is that it tends to leak. There’s a slip mechanism in the cap that both prevents the ink from drying out and from leaking beyond the tip of the pen, but as you can see in the photo below, you need to be careful when you start using the pen where you grip it, or just accept ink stains on your fingers (or keep a paper towel at hand).

The pen uses a proprietary Tombow Object refill, which is always a shame. I wish that I could just pop in any fountain pen ink cartridge in there instead.

The slip cap also allows you to easily post this pen, although I don’t recommend it. For one thing, it isn’t necessary as the pen is long enough as it is, and for another, because the pen leaks into the cap you’ll just spread ink on the pen body.

It’s ink test time! Here’s a sampling of how the Tombow Object rollerball behaves on different kinds of paper:

Clairefontaine Back to Basics A5 notebook (90 gsm, fountain pen friendly paper)
Reverse side of Clairefontaine Back to Basics A4 notebook. 
Leuchtturm 1917 Reporter notebook.
Reverse side Leuchtturm 1917 Reporter notebook.
Baron Fig Confidant notebook
Reverse side Baron Fig Confidant notebook
Field Notes 50#T paper (Firespotter).
Reverse side Field Notes 50#T paper (Firespotter).
Moleskine 70 gsm paper (Antwerp Blue Denim). 
Reverse side Moleskine 70 gsm paper (Antwerp Blue Denim). Note: there was less bleed through the more this pen was used (you can see in the Object and in my review of this notebook) but there was still significant show through. 

None of this is great, but to be frank, this is generally in keeping with rollerball behaviour, and one of the reasons that I really don’t like the Retro51 Schmidt rollerball refills. The Object behaved best on the Clairefontaine paper, and even displayed some fetching line variation. It’s still a “one side of the page only” type of pen though.

As for the cap-and-body switching hack, it only partially works. You can take the body of a Tombow Object rollerball and switch it with one from a Tombow Object fountain pen, but the plastic insert in the cap that prevents the ink from drying up or leaking is incompatible between models. The pen just won’t snap shut with the “wrong” type of cap.  It does still allow for some crazy cap/body combos, but that a whole different ballgame.

So would I recommend this pen? It is beautifully designed, looks great, is comfortable to use and you can find it on the secondary market for the price of a Retro51 or slightly cheaper. The enormous downside to this pen is that it uses a proprietary refill (I have not yet tried to hack it to see if it can accept other refills). So if  you like this pen I would recommend stocking up on those refills, because Tombow might not offer them for sale forever. The Tombow Object and the Tombow Egg which use them have both been discontinued for a few years now, which is a great pity.

Tombow Object Rollerball Review