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ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
Kaolin: China Clay Washed Out of Decomposed Granite
Kaolin, china clay, is granite whose felspar has rotted to a soft white clay. Washed in water, the fine clay stays suspended while sand and mica sink. Andrew Ure (1839) describes the Sèvres way: stir it hard in a cask, let the grit settle a few minutes, run the milky clay off through a very fine sieve and let it settle in covered vats.
The picture: the white china clay pit at Wheal Martyn, Cornwall.
Olùbẹ̀rẹ̀
A day's washing, a week drying
Ìlànà
1
1
Dig the rotted granite
Dig the rotted granite
Dig soft, white, crumbling granite where the felspar has turned to clay.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Òkúta kaolin (graniti tó ti jẹrà)50 kgÀwọn irinṣẹ́ tí a nílò:
Ọ̀kọ́-àpáta
Ọkọ́
Òǹwọ̀n ìdọ́gba2
2
Stir it up in water
Stir it up in water
Put a charge in a barrel, run water in gradually and stir hard in every direction with a bar.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Omi100 lítàÀwọn irinṣẹ́ tí a nílò:
Àgbá igi
Ọ̀pá Ìrúwé3
3
Settle the grit, run off the clay
Settle the grit, run off the clay
Let it stand a few minutes so sand and mica sink. Pour or draw the milky water off just above the grit, through a very fine sieve, into a covered vat.
Àwọn irinṣẹ́ tí a nílò:
Ajọ Ojú Kékeré
Ọpọ́n igi ńlá4
4
Settle and siphon
Settle and siphon
Leave the vat until the clay has settled and the water is clear, then siphon the water off. Wash the grit again for more clay.
Àwọn irinṣẹ́ tí a nílò:
Ọ̀pá ìfàsẹ́yìnỌpọ́n igi ńlá5
5
Dry and powder
Dry and powder
Spread the soft clay on plaster bats to stiffen, then dry it fully. Use it as a lump clay, or crush it fine and sift for kaolin powder. Store it dry.
Àwọn irinṣẹ́ tí a nílò:
Àwo pilásítà fún iṣẹ́ ìkòkò
Odó àti Ọmọ OdóAjọ Ojú Kékeré
Ìgò Gílásì6
6
Your yield
Your yield
Ń ṣí ìwé Jupyter…
Àwọn irinṣẹ́ tó nílò
11- Àyè
- Àyè
- Àyè
- Àyè
- Àyè
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