UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
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.
Utangiye
A day's washing, a week drying
Amabwiriza
1
1
Dig the rotted granite
Dig the rotted granite
Dig soft, white, crumbling granite where the felspar has turned to clay.
Ibikoresho by'iyi ntambwe:
Urutare rwa kaolini (granite yaboze)50 kgIbikoresho bikenewe:
Isuka y'ikinyabutare
Isuka
Umunzani w'ibiro2
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.
Ibikoresho by'iyi ntambwe:
Amazi100 litiroIbikoresho bikenewe:
Igitebo cy'igiti
Akati ko Kuvanga3
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.
Ibikoresho bikenewe:
Akayunguruzo Gafite Urukoma Ruto
Igikonjo4
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.
Ibikoresho bikenewe:
Umuyoboro wo gusiphonaIgikonjo5
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.
Ibikoresho bikenewe:
Ikibaho cya plâtre cy'ububumbyi
Isekuru n'UmuhiniAkayunguruzo Gafite Urukoma Ruto
Icupa ry'Ikirahure6
6
Your yield
Your yield
Gupakira ikaye ya Jupyter…
Ibikoresho bikenewe
11- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
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.