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Roman Black: Resin Soot from a Vaulted Chamber, for Ink and Fresco (Vitruvius)
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14. Ugushyingo 2026DE
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Roman Black: Resin Soot from a Vaulted Chamber, for Ink and Fresco (Vitruvius)

Vitruvius's Roman way to make black: burn resin in a small closed furnace whose smoke vents into a smooth vaulted chamber, sweep the soot off the walls, and work it with gum for writing ink or with size for fresco. Two quick substitutes: pounded pitch-pine charcoal, or roasted wine lees.
Hagati
A day of burning, plus sweeping

Amabwiriza

1

Three Roman blacks

Gupakira ikaye ya Jupyter…
2

Read the Ten Books

"A place is built like a Laconicum, and nicely finished in marble, smoothly polished."
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Build the soot chamber

Build a small vaulted chamber with smooth inner walls (he finished it in polished marble; we use smoothly plastered brick). In front of it build a small furnace with vents leading into the chamber and a stokehole that closes tightly so no flame escapes.

Ibikoresho by'iyi ntambwe:

ItafariItafari1 igice
IbumbaIbumba1 igice

Ibikoresho bikenewe:

Umwiko w'umwubatsiUmwiko w'umwubatsi
4

Burn the resin

Put resin in the furnace and close the stokehole. The fire drives the soot through the vents; it settles on the walls and the curved vault.

Ibikoresho by'iyi ntambwe:

Ubushishi bw'igiti cya pineUbushishi bw'igiti cya pine1 igice
5

Gather the black

When cool, sweep the soot off the walls and vault. Work some of it with gum for writing ink; mix the rest with size for wall painting.

Ibikoresho by'iyi ntambwe:

Ubunyu bw'igiti (gum arabic)Ubunyu bw'igiti (gum arabic)1 igice
Ifatanyo ry'uruhu rw'inyamaswaIfatanyo ry'uruhu rw'inyamaswa1 igice

Ibikoresho bikenewe:

AmababaAmababa
Icupa ry'IkirahureIcupa ry'Ikirahure
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Makeshift blacks

Without a chamber: burn pitch-pine shavings and splinters to charcoal, put them out, and pound them in a mortar with size. Or dry wine lees, roast them in an oven, and grind them with size: the better the wine, the nearer the colour to India ink.

Ibikoresho by'iyi ntambwe:

Ibisigazwa bya divayiIbisigazwa bya divayi1 igice
Ifatanyo ry'uruhu rw'inyamaswaIfatanyo ry'uruhu rw'inyamaswa1 igice

Ibikoresho bikenewe:

Isekuru n'Umuhini by'IbuyeIsekuru n'Umuhini by'Ibuye
7

Troubleshooting

Roman black troubleshooting.

Flow

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8

History and honest limits

From Vitruvius, **The Ten Books on Architecture**, translated by Morris Hicky Morgan (1914), Book VII, Chap. X (checked on the archive.org scan vitruviustenbook00vitruoft, pp. 217-218). He gives no sizes; the brick chamber and the heads are ours.

Ibikoresho

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Ibikoresho bikenewe

4

CC0 Umurenge rusange

Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.

Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.

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