The first bottle of ink you buy is a small gamble. The colour in the shop photograph looked like autumn leaves; on your paper it reads as watered-down blackcurrant. Or the reverse: an unglamorous grey-brown turns out to be the best thing you have written with all year. A swatch is how you find out which one you have bought before you commit it to a three-page letter or a freshly cleaned pen.

Swatching has a reputation as a collector's ritual — rows of neat squares on expensive paper. It can be that, and there is nothing wrong with it. But its real value is as a reference: a short, honest record of what an ink looks like, how it behaves on the paper you actually use, and whether it will survive a rain-soaked envelope or a careless mug of tea.

What a Useful Swatch Records

A swatch is only as good as the notes beside it. A pretty patch of colour with no context will tell you nothing in six months' time. Even a scrappy version works well if it carries these six things:

• Ink and maker, plus the date you swatched it. Bottles change subtly over time as they evaporate, so the date matters more than you would think.
• The paper. The same ink can look dusty on absorbent copy paper and jewel-bright on a smooth coated sheet. If you swatch on paper you never write on, you are cataloguing a fiction.
• The pen or nib. A fine nib shows an ink's true darkness; a broad or stub nib shows its shading and sheen.
• Three words of colour. Be specific and slightly unkind — "muddy olive", "cold steel blue". Your own shorthand beats a brand's poetry.
• Drying time in seconds, as measured on that paper.
• A water-resistance rating and a note on what happened.

The Kit: Keep It Small

You do not need much, and you certainly do not need matching equipment. A dip pen or glass pen is handy because it lets you test an ink without flushing a whole fountain pen, but a cotton bud and the pen already in your pocket will do the job.

• A notebook, index cards or a cheap sketchbook — something flat that will not buckle
• A dip pen, glass pen, or two fountain pens (one fine, one broad)
• A few cotton buds
• A small water brush, pipette or even a teaspoon
• Kitchen roll or a clean cloth
• A phone timer, and a pencil for labelling

Making Your First Swatch, Step by Step

1. Label first. Write the maker, ink name, paper and date at the top of the space. Do this before the ink goes down, while your hands are still clean.
2. Lay down a saturation block. Touch a soaked cotton bud to the paper and let a bead of ink sit for a second or two, then swipe it downward in one slow stroke. You will see the full strength at the top and the paler tones below.
3. Write the ink's name with a pen. Once with a fine nib, once with a broad one. This is the line that tells you whether the ink feels dry or generous.
4. Leave it alone. Give the whole page half an hour before you handle it, and ideally overnight before the water tests.
5. Run the tests described below, then write your notes while the evidence is in front of you.

[Maker] · [Ink name] · [paper] · [date] · [nib] — Colour: [three words] / Shading: [none, some, heavy] / Sheen: [none, faint, strong] / Dry: [number] seconds / Water: [rating and what happened]

Reading Colour: Saturation, Shading and Sheen

Saturation is how much dye is in the ink, and it is the easiest thing to judge from a cotton-bud swipe: a heavily saturated ink stays dark all the way down the swipe, while a lighter one fades to a wash. That matters practically. A low-saturation ink in a fine nib can look grey and tired; the same ink in a broad nib is delicate and lovely.

Shading and sheen

Shading is the variation between the pale and dark parts of a stroke. It shows up best with a drier nib on smooth paper, and it disappears entirely on absorbent paper that soaks the ink in flat. Sheen is the metallic glint that sits on top of a dried line — usually red, gold or green — and it needs a wet nib and a coated or tomoe-style paper to appear at all. Test both on the paper you genuinely write on, or your notes will flatter inks you will never see at their best.

Flow and Drying Time

Flow is not purely a property of the ink; it is a conversation between ink, nib and paper. An ink that feels slick and lubricated in one pen can skip in another. So when you test, use the pen you intend to fill. Note whether the nib glides or drags, whether the line starts immediately after a pause, and whether the ink feathers into the fibres of cheap paper.

For drying time, make a normal line, then touch it lightly with a fingertip or a folded tissue every five or ten seconds until nothing transfers. Record the number. Expect a fine nib on smooth paper to dry in a handful of seconds, and a broad wet nib to take far longer. Humidity adds time; a cold, damp day can more than double it. If you are left-handed, this is the single most valuable line in your swatch book, because it tells you which inks to avoid for longhand writing and which to save for quick notes.

Water Resistance: Three Tests

Let the swatch dry overnight first. Fresh ink lifts far more easily than ink that has had time to settle into the paper.

• The drip test. Place a single drop of water on the written line. Wait about thirty seconds, then blot it with kitchen roll. A waterproof ink leaves the line untouched; a water-resistant one leaves the line readable but softened; a washable ink blooms into a coloured halo and much of the line vanishes.
• The wash test. Draw a wet water brush or damp cotton bud across the line once. This mimics a spill being wiped up, and shows you how much colour moves.
• The envelope test. Write an address, let it dry fully, then run a highlighter over part of it or hold the paper briefly under a tap. If you post letters in British weather, this is the test that counts.

Rate each ink from one to five — one being "gone entirely", five being "unchanged" — and add a few words about what actually happened. If you are filling in an official form or signing something that needs to last, check what the document asks for rather than assuming a fountain pen ink will be suitable.

Keeping a Swatch Book You Will Actually Use

Consistency in one place is enough: if every entry has paper, date, drying time and a water rating, you can forgive yourself for the rest. Keep the book near your inks, not filed away somewhere sensible, and flick through it before you buy a refill or fill a pen for a specific job. Revisit older swatches occasionally — a year-old entry for an ink you dismissed may look different now that your taste, and your nib collection, have moved on.

Start with the bottles already on your shelf. Five inks, one evening, and a page of notes that will save you from buying the same disappointing brown twice.

Photo: Bru-nO / Pixabay