Conid King Size Bulkfiller Review: Big Pen, Bigger Ink Capacity

Introduction

The Conid King Size Bulkfiller occupies a curious place in the fountain pen world. It is not a new pen, but it is about to become far easier to talk about, with re-releases planned through Penworld in Belgium. For this hands-on look, we spent time with a King Size demonstrator with titanium trim, a pen designed around one idea above all else: maximum ink capacity.

Conid has historically been difficult to buy from, with limited manufacturing windows and made-to-order production. The return to a stock-based model is a genuine shift for anyone who has wanted one of these pens but never managed to catch a production run.

Design, Packaging, and Build

Conid keeps things refreshingly simple. The pen arrives in an industrial-style metal box that lists the makers behind it, along with a polishing cloth and a user guide that is essentially a photo-based walkthrough of the filling system. The packaging is minimal, secure, and not wasteful.

One detail worth knowing: the disassembly tools are sold separately rather than included. That may sound stingy, but it is arguably a fair system. If you own several Conids, you are not paying for duplicate tools with every purchase, and the tools remain available separately if you buy used.

The pen itself is an industrial-looking demonstrator with a flat cap top, titanium section and trim, and a number 8 Bock nib. It is not colorful and it will not appeal to everyone, but it is a genuinely tough pen with a coherence to it that grows on you.

The Bulkfiller Filling System

The Bulkfiller is a hybrid of piston and vacuum filling, designed, in the words of one of Conid’s founders, for those who want the best possible ink capacity. It uses a double reservoir designed to be leak proof, which is the heart of the appeal: a pen built for intense use and travel, where you do not want to carry extra ink.

Filling takes three steps. First, unscrew the piston knob, which opens the seal of the writing reservoir and doubles as the way to fill or empty it for travel. Second, pull the rod back and screw it into the piston at the back. Third, depress the whole assembly to create the vacuum that draws ink in.

It is intuitive once you get the hang of it, and it is genuinely enjoyable to use. You can also modulate the ink flow by managing how much ink sits in the reservoir or shutting it off. It is not the fastest system available, and it will not beat an eyedropper for speed, but ink capacity ranges from 2.5 ml to 6 ml depending on the model, which is enormous by fountain pen standards.

Size, Comfort, and Handling

The King Size is exactly what the name suggests. Lined up against a Montblanc 149 and a Montblanc 146, it is bigger than both, and thicker too. It carries some weight as a result, and there are people who will not enjoy that. There is also, depending on the model, a lot of ink on board as compensation.

Where the pen surprises is comfort. The brushed titanium section looks like it might be slippery, but it has real grip to it. Everything works together in hand, the balance is spot on, and what looked like an oversized pen in the case turned out to be genuinely comfortable in use. It does post, though doing so makes the pen enormous, so most will leave the cap off.

Versatility: Swappable Nib Collars

One of the most interesting things about Conid pens is the collar system. Through retailers like Flexible Nib Factory, you can buy collars that let the pen hold different makers’ nibs: Sailor 21k King of Pen nibs, Montblanc 149 nibs, Pelikan M1000 nibs, Platinum, Pilot number 5 and number 10, and more.

That makes the pen a vehicle not just for ink but for versatility. If you already have a collection of nibs, a Conid can make far more of them usable. On a smaller Conid Minimalistica, for example, a collar allows a Pelikan M800 nib to drop straight in.

Writing Performance

The pen we handled was fitted with a 14k gold double broad Bock number 8 nib. Ink flow is generous, roughly a 9 out of 10 on the juice scale, which suits the big-canvas personality of the pen. It is a genuinely pleasant writer with real presence on the page.

Two caveats apply. The sample nib was slightly over polished and had a small sweet spot, and the pen had not been tuned for us, so the writing sample does not represent a fresh retail unit. Also note that Montblanc nibs are commonly fitted to these pens, so the writing experience can vary depending on configuration.

Buying Advice

The honest picture is this. Conids are not inexpensive: expect something in the range of 700 to 1,000 euros. They are hard to get, the re-release through Penworld currently covers only the red Juma-style Antwerp model in regular, king size, and varying degrees of demonstrator, and this particular demonstrator configuration is not available, at least for now.

If the filling system, the huge ink capacity, and the nib versatility speak to you, it is worth acting quickly when stock appears, because demand is likely to outstrip supply. If you prefer colorful, traditional-looking pens, this industrial demonstrator may simply not be your pen, and that is fine.

Conclusion

The King Size Bulkfiller is a big, tough, uncompromising pen built around an unusually clever filling system and a genuinely massive ink capacity. It will not suit everyone, and the price and availability are real hurdles. But for writers who burn through ink, travel with their pens, or enjoy swapping nibs across makers, it is one of the most distinctive options on the market. Among pen people, opinion is divided between those who love Conid and those who do not get the appeal, and both positions are legitimate. If you are in the first camp, this is a pen worth hunting down.