MORDANT — Vault of Unmixable Pigments

The Vault Register

An honest accounting of the colours we cannot trust.

Most pigments consent to one another. Ground fine enough, wetted well enough, they marry into new hues and forget their origins. The six lots below do not. They curdle, spread, refuse, and swallow. The Vault floats them on still water — the only surface on which they may be studied without being combined — and records what it sees.

Entries verified by the Second Keeper · errors are hers alone

Hold your cursor to it. It hums back.

Ochre Virelai the patient one

Lot: № 0113
Origin: The Singing Seam, east cut
Temperament: Docile, until wetted
Containment: Class II · open trough

Dug from a seam of earth that hums a low continuous note — miners called it the Virelai, after the old round-song, because the note has no beginning they could find. Dry, it is the gentlest lot in the vault: a warm, obedient gold that will sit in a jar for a decade without complaint.

Wet, it remembers the song. Ochre Virelai will not accept any second pigment into its body; it holds its edge on the bath like a held breath, and neighbouring colours are pushed into fine feathered fringes around it. The Keepers use it as a standard of refusal — the ruler against which the other lots' tempers are measured.

Do not look at it longer than the page.

Lapis Interdict the jealous blue

Lot: № 0027
Origin: Quarry unrecorded, by order
Temperament: Jealous · light-hoarding
Containment: Class III · shaded shelf

A stone blue of unreasonable depth. The quarry it came from was struck from the register by the First Keeper herself, on the grounds that a colour this possessive should not know its own way home.

Interdict does not blend because it does not share. Placed beside another pigment it drinks the light meant for its neighbour, so that adjacent colours photograph dimmer than they are. On the bath it forms deep, glassy pools with edges like cut slate. Apprentices are taught to comb it quickly and not to admire it, which no apprentice has yet managed.

Standing cautionLedger entries written in sight of Lot 0027 tend toward the florid. Keepers are advised to face away while writing.

Touch it and it curdles. Told you.

Cochineal Tithe the exacting crimson

Lot: № 0491
Origin: Farmed lantern-beetle, 9th brood
Temperament: Exacting · quick to curdle
Containment: Class II · ninety-one jars

Rendered from the shells of the lantern-beetle, a farmed insect that glows faintly crimson when content and refuses to glow at all when it is not. Each brood yields exactly ninety-one jars — never ninety, never ninety-two — and the beetle-wards long ago stopped asking why. They call the yield the Tithe and take what they are given.

The crimson inherits the insect's precision. Introduce a foreign pigment and Tithe curdles on contact, breaking into sharp specks like a scolded custard, then re-forming the moment the intruder is combed away. It is the vault's most legible colour: it cannot lie about being touched.

It is already larger than when you arrived.

Verdant Nonesuch the green that spreads

Lot: № 0666
Origin: Volunteer — appeared in an empty jar
Temperament: Expansive · RESTRICTED
Containment: Class V · measured twice daily

No one ground Verdant Nonesuch. An empty jar on the tincture shelf was found one spring morning to contain three grams of a green with no receipt, no ledger line, and no smell of any known binder. It has been three grams ever since — but only because the Keepers skim the excess every evening and burn it in the yard.

On the bath it does not float so much as advance. A single drop will, if left uncombed, quietly annex the whole trough by morning, each neighbouring colour thinned to a rumour at its border. It never blends. It simply arrives, everywhere, politely.

Restriction noticeVisitors may drop Lot 0666 into Bath VII. Visitors may not leave Bath VII unattended afterwards. The Vault thanks you for your custody.

It will not be cornered. Try.

Moonmilk Ceruse the white that declines

Lot: № 0009
Origin: Cave-milk, gathered at new moon
Temperament: Evasive · RESTRICTED
Containment: Class IV · lidless (it prefers it)

Scraped, a spoonful a season, from the soft white curd that weeps from the ceiling of a cave the gatherers will only visit moonless. It is the oldest lot in the vault — № 0009 of the original hundred, and one of four to survive the Great Curdling intact, chiefly by getting out of the way.

Ceruse declines. Brushes miss it. Combs pass through where it was. On the bath it slips between other colours like a rumour through a dinner party, whitening their borders without ever being caught in possession of a blend. The Keepers have stopped trying to corner it and now simply thank it for attending.

The swatch is not empty. Look again.

Lacuna Black the colour that keeps

Lot: № 0000
Origin: Residue of the Great Curdling
Temperament: Absorbent · DO NOT BATH
Containment: Class VI · the small stone room

When the Great Curdling was over and the ruined bath was drained, something remained in the trough that was not any of the eleven pigments lost that day. The Keepers scraped it up, weighed it — heavier than its parts — and gave it the only lot number left: zero.

Lacuna Black is not black the way soot is black. It is black the way a locked drawer is black. Colours dropped against it do not blend and do not curdle; they are simply filed. The Second Keeper maintains, quietly and in the margin, that on very still nights the drawer can be heard sorting.

Deaccession orderLot 0000 is withdrawn from Bath VII in perpetuity. The swatch printed here was made before the order and cannot now be unprinted. We have apologised to it.

Standing Protocols of the Bath

Float, never stir.

Stirring is combination by force. The bath persuades; it does not insist. A stirred lot is a lost lot, and possibly a lost Keeper.

Comb with the grain of the water.

The comb is a question, not an argument. Feathered edges mean the colour is answering. Sharp edges mean it is thinking.

Record the refusals.

What a colour will not do is the truest thing about it. The register keeps refusals in ink and successes in pencil.

Change the water at dawn.

Yesterday's arguments settle overnight into the trough. Morning water is neutral water. Afternoon water has opinions.