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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.
Àárín
4 days
Ìlànà
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ìṣọ Irin1 as required
Ọtí kíkan1 as requiredÀwọn irinṣẹ́ tí a nílò:
Ìgò Gílásì Onídìí2
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Varnish urushi tútù1 as requiredÀwọn irinṣẹ́ tí a nílò:
Àwokòtò igi
Aṣọ Òwú
Ìbọ̀wọ́ Nítírílì3
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.
Àwọn irinṣẹ́ tí a nílò:
Àwo igi onílákà tí kò jìn (urushi bachi)
Ọ̀pá ìrú igi4
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.
Àwọn irinṣẹ́ tí a nílò:
Àwo igi onílákà tí kò jìn (urushi bachi)
Ọ̀pá ìrú igi
Èédú5
5
Strain twice
Strain twice
Pass the black lacquer twice through cotton cloth. It is ready to use as black lacquer without further treatment.
Àwọn irinṣẹ́ tí a nílò:
Aṣọ Òwú
Ìgò Gílásì Onídìí
Ìbọ̀wọ́ NítírílìÀwọn ohun-èlò
3- 1 as requiredÀyè
- 1 as requiredÀyè
- 1 as requiredÀyè
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