UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Potassium Bromide: Iron Bromide and Potash
Potassium bromide is the bromide of photography. Thorpe (1913): iron bromide solution run into hot potash solution until it is just neutral throws down the iron as oxide and leaves potassium bromide in solution, which is filtered, evaporated and crystallised. 100 parts of iron bromide take 56 to 60 parts of potash.
The picture: potassium bromide crystals (Wikimedia Commons).
Hagati
2 days
Amabwiriza
1
1
Make the two solutions
Make the two solutions
Dissolve the iron bromide in water and filter it. Dissolve 56 to 60 g of potash, according to its purity, in a little water and heat it.
Ibikoresho by'iyi ntambwe:
Bromure y'icyuma100 g
Karubonate ya potasiyumu (potashi)60 gIbikoresho bikenewe:
Amazi
Igitambaro cy'ipamba kinini cyo kuyungurura
Inkono y'icyuma cyasuwe
Umunzani w'ibiro2
2
Run the iron bromide into the potash
Run the iron bromide into the potash
Pour the iron bromide solution into the hot potash until the liquid is exactly neutral or very faintly alkaline. Iron oxide falls out.
Ibikoresho bikenewe:
Inkono y'icyuma cyasuwe
Urupapuro rwa litimusi
Uturindantoki tw'ikawusu3
3
Boil and filter
Boil and filter
Boil for some time so the iron oxide settles dense, then filter it off.
Ibikoresho bikenewe:
Inkono y'icyuma cyasuweIgitambaro cy'ipamba kinini cyo kuyungurura4
4
Dry, then dissolve again
Dry, then dissolve again
Evaporate to dryness. Dissolve the residue again in water: potassium sulphate and other dirt stay behind. Filter.
Ibikoresho bikenewe:
Inkono y'icyuma cyasuweAmaziIgitambaro cy'ipamba kinini cyo kuyungurura5
5
Crystallise
Crystallise
Boil down to specific gravity 1.53, then evaporate further at a gentle heat in a stoneware or enamelled dish, for hard crystals.
Ibikoresho bikenewe:
Inkono y'icyuma cyasuwe
Igipima ubwuzuzanye bw'amazi
Isahani yo kumisha6
6
Dry at 40 to 50 °C
Dry at 40 to 50 °C
Dry the crystals at 40 to 50 °C, not above, or they crackle and burst.
Ibikoresho bikenewe:
Isahani yo kumisha
Igipima UbushyuheIbikoresho
2- 100 gUmwanya
- Umwanya
Ibikoresho bikenewe
9- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
Blueprint zijyanye
Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame
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.