Bulkfiller Kingsize

Shop Conid Bulkfiller Kingsize ↗

A model in Conid's fountain pen lineup. Specs below reflect the typical configuration across Conid's core range.

A solid mid-range option once someone has decided fountain pens are a habit worth investing a bit more into.

Specs

Filling systemPiston filler (Bulkfiller system, unusually high capacity)

Ink capacityVaries by model

Nib optionsEF – BB (steel or gold, Bock)

MaterialAluminum or Delrin

Typical price$300 – $600 across the lineup

How long has your Bulkfiller Kingsize been inked?

Inktend counts the days and reminds you when it's time to clean.

Track it →

About Conid

A technically inventive Belgian maker best known for the Bulkfiller, a piston system with an unusually high ink capacity; production has been intermittent in recent years.

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How to fill the Conid Bulkfiller Kingsize

Unscrew the piston knob at the back of the pen, submerge the nib fully in a bottle of ink, and slowly turn the knob counter-clockwise then clockwise to draw ink in. Piston fillers hold significantly more ink than a standard cartridge — often enough for several weeks of regular writing — at the cost of being limited to bottled ink only.

Choosing a nib size

Nib size determines line width, not writing pressure — fountain pens are meant to glide, never press. Extra-fine (EF) suits small, dense handwriting and thin paper; fine (F) is the most broadly recommended default; medium (M) shows more ink character and shading; broad (B) and stub grinds favor bold, expressive strokes and calligraphy-adjacent writing. The Bulkfiller Kingsize's gold nib will also flex slightly with pressure, giving line variation that a steel nib of the same size won't produce.

Keeping it clean

Because Conid Bulkfiller Kingsize holds a larger ink reserve, a full flush every 4–6 weeks (or whenever you switch colors) keeps the feed running cleanly. Inktend's cleaning reminder is tuned to a 21-day baseline and adjusts naturally to how often you actually refill.

Pairing inks with the Bulkfiller Kingsize

High-capacity fillers like this one are the natural home for sheening and shading inks; you'll actually see the color develop across a full page instead of running out mid-paragraph.

Browse the full ink library →

Frequently asked questions

How do I fill the Conid Bulkfiller Kingsize?

Unscrew the piston knob, submerge the nib in a bottle of ink, and turn the knob to draw ink in. It holds far more than a cartridge but only works with bottled ink.

What nib size should I get for the Bulkfiller Kingsize?

Fine (F) is the safest default for a first pen. Go finer for small, dense handwriting; go broader if you want more ink character and shading.

How often does the Bulkfiller Kingsize need cleaning?

Every 4 to 6 weeks, or whenever you switch ink colors, whichever comes first.

Is the Conid Bulkfiller Kingsize good for beginners?

It can work as a first pen if you're comfortable spending a bit more to start.

More from Conid

Specs reflect the typical configuration across Conid's core lineup rather than this exact model — check current listings before buying.