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Tannin Mordant Extracted from Oak Galls
Dr Mary Gillham Archive Project · CC BY 2.0
Charlie

Yenziwe ngu-

Charlie

14. uMfumfu 2026DE
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Tannin Mordant Extracted from Oak Galls

Oak galls are rich in tannin (gallotannic acid). Tannin is a common mordant for cotton and linen: the fibre is tanned first, then metal mordants and dyes bind to it. Crush the galls, steep them in hot water, strain, and dry the liquid down to a brown powder. The picture: young marble galls on an oak.
Oqalayo
Two days

Imiyalelo

1

Crush the galls

Weigh the dry galls and pound them to a coarse powder in the mortar.

Izinto zokwakha zalesi sinyathelo:

Ama-gall omuthi wom-oakAma-gall omuthi wom-oak200 g

Amathuluzi adingekayo:

Isikali sesilinganisoIsikali sesilinganiso
Isigqulo NomgquloIsigqulo Nomgqulo
2

Steep hot

Cover the powder with water in a pot and keep it hot, not boiling, for an hour or two. Leave it overnight.

Izinto zokwakha zalesi sinyathelo:

AmanziAmanzi2 amalitha

Amathuluzi adingekayo:

Ibhodwe ElikhuluIbhodwe Elikhulu
3

Strain

Strain the brown liquid through cloth and squeeze the residue. Steep the residue once more and add that liquid.

Izinto zokwakha zalesi sinyathelo:

AmanziAmanzi1 ilitha

Amathuluzi adingekayo:

Indwangu kashiziIndwangu kashizi
Ibhodwe ElikhuluIbhodwe Elikhulu
4

Dry to powder

Boil the liquid down, then finish drying it in a shallow dish on the sand bath. Scrape it off, grind it fine and keep it in a closed jar.

Amathuluzi adingekayo:

Ibhodwe ElikhuluIbhodwe Elikhulu
Ipuleti LokuhwamukaIpuleti Lokuhwamuka
Ibhavu lesihlabathiIbhavu lesihlabathi
Isigqulo NomgquloIsigqulo Nomgqulo
Ijeke LengilaziIjeke Lengilazi
5

Yield

Ilayisha incwadi ye-Jupyter…

Izinto

2

Amathuluzi Adingekayo

7

Le blueprint yenza

Thumbnail
Isibambeli

I-tannin (i-mordant yemvelo)

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Ama-blueprint ahlobene

Lama-blueprint abelana ngolwazi — amasu, izinto noma izimiso

Sand Bath in a Sunk Iron Pan

Sand Bath in a Sunk Iron Pan

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Umsebenzi Wensimbi

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Sekela uMenzi ngokuthenga imikhiqizo nge-Blueprint yabo IKhomishane Yomenzi kumiswe ngabathengisi, noma dala inguqulo entsha yale Blueprint bese uyifaka njengoxhumaniso ku-Blueprint yakho ukuze wabelane ngemali engenayo.

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