How to Remember What’s Inked in Every Fountain Pen

You reach for a pen, twist the cap, and pause. Is this the one with the blue-black or the soft grey? You wrote with it last week and somehow the answer is already gone. With two or three pens on the desk that moment is annoying; with a rotation of five or six it becomes a small daily tax. Fountain pens do not announce what is inside, and ink colors look alike through a barrel. The fix is not a better memory. It is a habit of noting what you filled, when, and with which nib — so you never have to open a pen just to remember.

Why uncapping to check wastes ink and time

Every time you uncap a fountain pen for a “quick look,” you expose the nib and feed to air. A few seconds seems harmless, but it adds up:

Evaporation and dry-out. Open air pulls moisture from the ink in the feed. Do it often enough and the next real writing session starts with a hard start, a skip, or a rinse you did not plan.
Cap seal fatigue. Caps are designed to stay on. Repeated open-and-close checks wear the habit of sealing well, especially on pens that already sit a little loose.
Ink on the desk. A quick check often means a scribbled line on scrap paper. That is fine once; it is wasteful when you do it three times a day across half a dozen pens.
Time that should have been writing. The whole point of keeping pens inked is to pick one up and go. Hunting for the right color by uncapping each barrel turns a five-second choice into a ritual.

If you have ever lined up three pens and written a dab from each to find the teal you wanted, you already know the cost. A log costs a few seconds at fill time and saves that dance every day after.

Note the nib, ink, and when you filled it

You do not need a novel. Three fields cover almost every “what is in this pen?” question:

Pen and nib. Name the pen the way you actually think of it — “Pilot Custom 74, soft fine” or “Lamy Safari, 1.1 stub.” If you swap nibs, write the nib that is currently mounted.
Ink. Brand and color name, not just “blue.” Two blues from different makers can look nothing alike on the page, and a vague label helps nobody later.
Fill date. The day you filled or refilled. That single date tells you how long the ink has been sitting, which matters when a pen has been idle for weeks and you wonder whether to flush before travel.

Optional notes that earn their keep: how wet or dry the combination felt, whether you shook the bottle first, and a short line if the ink is known to stain or shade. When you empty the pen, mark that too — empty and inked are different states, and mixing them up is how you “discover” a dry barrel mid-meeting.

Capture the entry at the sink or the desk right after you fill. Waiting until tonight is how the entry never happens. If you change ink mid-week, update the same record instead of starting a second mental list.

Rotate pens without surprises

A rotation only works when you trust what each pen holds. With a short history per pen you can:

Match the ink to the job. Grab the stub with the warm brown for journaling and leave the fine blue-black for forms and notes, without uncapping either.
Avoid accidental mixes. When you decide to switch colors, you already know what is in the converter or cartridge, so a flush is intentional instead of a muddy surprise.
Spot pens that sit too long. A fill date from six weeks ago on a pen you have not touched is a nudge to write with it, empty it, or clean it before the feed gums up.
Travel lighter. Pack two pens and know exactly which inks you are carrying, instead of opening everything at the hotel desk.

Rotation is supposed to feel easy. Surprises — the wrong color on a card, a dry nib when you needed a signature, an ink that feathers on cheap paper — almost always come from not knowing what was inked. The log removes the guesswork so the pens stay tools, not puzzles.

A quiet log beats relying on memory

Memory is fine for one favorite pen. It fails the moment you keep a small collection inked at once, especially if you refill on different days or share a desk with more than one bottle open. A quiet log does not need to be fancy. Paper works if you open the notebook every time you fill. A note on your phone works if you actually find it later. What matters is that the record lives next to the habit: fill, write it down, cap, put the pen back.

Over a few months that log becomes more than a cheat sheet. You see which ink–nib pairs you reach for, which pens dry out when ignored, and which colors you thought you loved but never refill. That is useful when you are tempted by another bottle or deciding which pen to leave inked for a trip.

If you would rather keep the record on your phone, Nib & Ink is a quiet manual log for fountain pens and inks. Note what you inked, when you filled it, and how it wrote — so you never uncap just to remember what is inside. The free tier covers a small rotation (3 pens and 5 inks); a one-time Pro unlock adds unlimited pens and inks, fill history, star ratings, photos, search, and insights, with no subscription. It works offline and needs no account, so your collection stays on your device.