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UBUHANZI
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UBUKORIKORI
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IMYIDAGADURO
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Ro-iro Urushi: Black Lustre Lacquer, Raw Lac Blackened with Haguro Iron Vinegar (after Rein 1889)
Japanese black lacquer is not coloured with a black pigment. The lacquer makers added iron, dissolved in vinegar, to filtered raw lac and stirred off the water: the iron turns the lac a deep, lustrous black. The same iron vinegar, haguro, was used to blacken teeth.
Result: Ro-iro-urushi, the best black lustre lacquer, 0.5 to 2 % iron.
Source: J. J. Rein, The Industries of Japan (1889), pp. 350-353. Not given: how much haguro (set by the colour). Picture drawn by Youblob.
Hagati
4 days
Amabwiriza
1
1
Make haguro
Make haguro
Pour vinegar (or rice beer) over iron nails or filings and keep it several days in a warm place. The liquid is haguro, iron acetate.
Ibikoresho by'iyi ntambwe:
Imisumari y'Icyuma1 as required
Inkarabyo1 as requiredIbikoresho bikenewe:
Icupa ry'Ikirahure Rifite Umufuniko2
2
Grind and strain the raw lac
Grind and strain the raw lac
Grind good raw lac for some time in a shallow wooden tub so it flows evenly, then press it through cotton cloth. Ours: wear gloves; raw lac raises blisters on the skin.
Ibikoresho by'iyi ntambwe:
Ivarinishi rya urushi ribisi1 as requiredIbikoresho bikenewe:
Ikibindi cy'imbaho
Umwenda w'Ipamba
Uturindantoki twa Nitirile3
3
Add haguro to colour
Add haguro to colour
Stir haguro into the strained lac. The amount is set by the colour; the finished lacquer holds 0.5 to 2 % iron.
Ibikoresho bikenewe:
Igikombe cy'igiti cya laki kidacukumye (urushi bachi)
Ikiyiko kinini cy'igiti4
4
Stir off the water
Stir off the water
Stir it in a shallow pail or tub in the sun, or over a moderate charcoal fire, until all the water has gone.
Ibikoresho bikenewe:
Igikombe cy'igiti cya laki kidacukumye (urushi bachi)Ikiyiko kinini cy'igiti
Amakara5
5
Strain twice
Strain twice
Pass the black lacquer twice through cotton cloth. It is ready to use as black lacquer without further treatment.
Ibikoresho bikenewe:
Umwenda w'IpambaIcupa ry'Ikirahure Rifite UmufunikoUturindantoki twa NitirileIbikoresho
3- 1 as requiredUmwanya
- 1 as requiredUmwanya
- 1 as requiredUmwanya
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