Filling a fountain pen is one of those small skills that looks fiddly until the day it suddenly isn't. The first attempt usually involves too much ink, a stained thumb and the discovery that kitchen roll is less absorbent than it appears. By the third attempt, the whole thing takes ninety seconds and leaves nothing behind but a full reservoir and a quiet sense of order.
Most of the mess comes from not knowing which filling system you are holding. A cartridge pen, a converter and a piston filler each ask for different hands and different amounts of patience. Here is how to handle the three methods you will meet most often, plus the habits that keep ink inside the pen where it belongs.
First, Work Out What You Have
Unscrew the barrel before you buy anything. If the barrel comes away and reveals a small plastic tube or a metal mechanism sitting on the back of the section, you have a cartridge or converter pen. If the barrel does not come off at all, and there is a knob at the rear that turns, you are holding a piston filler, where the ink lives inside the barrel itself. Vacuum fillers look similar from the outside but use a plunger rod instead of a screw piston.
Eyedropper pens are the outlier: no cartridge, no converter, no piston, just a barrel you fill with a syringe or pipette and seal with a touch of silicone grease on the threads. They hold a lot of ink. They also demand respect, and we will leave them for another day.
Filling with a Cartridge
Standard or proprietary?
Most European pens take standard international cartridges, sold in short and long sizes. Short ones are handy because a second one often fits in the barrel as a spare. Many Japanese and American brands use their own design instead, and they are not interchangeable: a Pilot cartridge will not fit a Lamy, and a Lamy cartridge will not fit a Parker. Check the box or the pen's paperwork before buying a pack of twelve.
- Hold the pen with the nib pointing up and unscrew the barrel. Pointing it up stops any residual ink dribbling onto your hand.
- Drop the cartridge in narrow end first, so the sealed end faces the nib. That narrow neck is the part that gets pierced.
- Push it firmly onto the nipple until you feel the seal give. Some pens do this when you screw the barrel back on, and a few need a steady thumb press. If it refuses to seat, stop pushing. Forcing a cartridge usually ends with ink on your shirt and a cracked neck.
- Wait a minute or two with the nib pointing down, then check. If nothing happens, a couple of gentle squeezes on the cartridge body, or two short downward flicks over a sink, will move the ink along the feed.
- Wipe the nib and section with a soft tissue before you write.
Keep your spent cartridges. Rinsed out and dried, they can be refilled with a blunt syringe, which is the cheapest way to use a bottled ink in a pen that takes cartridges.
Filling with a Converter
A converter is simply a refillable cartridge, usually a twist piston, sometimes a squeeze bar or a plunger. Push it onto the nipple with a gentle twist until it seats properly; a loose converter sucks air and writes weakly.
- Stir the bottle gently if the ink has been sitting, then uncap it.
- Submerge the nib completely. At the very least the breather hole should be under the surface, and it is better to sink a sliver of the section as well. A half-submerged nib draws air, not ink.
- Turn the converter knob slowly in the direction that pulls the piston away from the nib. Slow matters: turn it fast and you whip bubbles into the reservoir. You may need two or three pulls before it is full.
- Lift the nib clear and push two or three drops back into the bottle. Then wind the piston back up. This primes the feed so the pen writes straight away instead of scratching dry for a paragraph.
- Wipe the section and nib with a tissue, working from the section towards the tip and turning the tissue as you go.
If it will not start
Do not shake the pen. Hold it nib down for a minute and let gravity do the work. If that fails, flick it downwards two or three times with the nib pointing away from you and over a sink. A hard shake throws ink into the cap, and cap ink waits patiently for the day you next uncap the pen over a white shirt.
Piston Fillers and Their Relatives
Piston fillers hold far more ink than a converter, which is why they are beloved of people who write for hours. Turn the knob at the rear until the piston sits at the nib end of the barrel, then dip the nib fully into the bottle and wind the piston back. Withdraw the pen, expel two or three drops, and close the piston. That small air gap discourages drips when the pen warms up in your hand.
On a few designs, backing the knob off a quarter turn once the pen starts running dry releases a little reserve ink to the feed. Vacuum fillers work differently: push the plunger down, dip the nib, pull the rod up to draw ink, then push it home slowly to expel the trapped air. Some need a second pull to fill completely.
Because they hold so much, piston pens take longer to flush. Clean them every few fills rather than once a year.
Habits That Keep Ink Off Your Fingers
- Work over a sheet of kitchen roll and keep a second, dry sheet for wiping. Ink on kitchen roll is a plan. Ink on the desk is a story you will tell for years.
- Wrap a narrow strip of kitchen roll around the section, just below the nib, while you fill. It catches the drip that runs down when you lift the pen out of the bottle.
- Wipe in one direction only, from section to tip. Wiping back towards the section pushes ink into the collar and, eventually, into the cap.
- Never fill on a cluttered desk or above an open notebook. Move the bottle to a clear, level surface and close it as soon as you are done.
- Wash your hands with warm water and soap. A little washing-up liquid helps shift stubborn patches, and most ink on skin fades within a day or two. On fabric, rinse in cold water before it dries, and treat anything valuable with care.
Cleaning and Switching Inks
Flush the pen with cool water, drawing and expelling until the water runs clear. For dried ink, add a drop of washing-up liquid to a cup of water, or use a proper pen flush. Avoid hot water, alcohol and nail varnish remover, all of which can damage plastics and finishes.
Then stand the nib in a glass wrapped in kitchen roll, nib down, and let the water wick out overnight. You will be surprised by the colour that appears. Let the pen dry before refilling, and flush twice if you are moving from a dark ink to a pale one. Pigment, shimmer and iron gall inks deserve more thorough cleaning and more regular use, since they behave badly if left to sit.
The Two-Minute Refill Routine
Lay out your kitchen roll, check which system you are holding, fill, wipe, prime, recap and put the bottle away. That is the whole routine, and it becomes second nature surprisingly quickly.
One small addition is worth the effort: note which ink went into which pen, along with the date. A line in a notebook is enough, and it saves you from discovering at the worst possible moment that the blue-black you just used to address an envelope is not the water-resistant one after all.
