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Ferric Ammonium Citrate: Ferric Hydroxide Dissolved in Citric Acid and Ammonia
Iron and ammonium citrate is the light-sensitive salt of the blueprint (cyanotype). The British Pharmacopoeia formula (US Dispensatory, 1907): throw down ferric hydroxide from ferric sulphate with ammonia, wash it, dissolve it in warm citric acid, add ammonia, and dry the syrup in thin layers below 38 °C to garnet-red scales. Keep it from light.
The picture: ferric ammonium citrate (Wikimedia Commons).
Ophakathi
2 days
Imiyalelo
1
1
Make 10 % ammonia water
Make 10 % ammonia water
Mix 2 parts of strong ammonia (25-28 %) with 3 parts of water to get about 10 %. You need about 460 ml.
Izinto zokwakha zalesi sinyathelo:
Isixazululo se-ammonia - 25-28 %190 mlAmathuluzi adingekayo:
Amanzi Acwengisisiwe
Ibhikha Le-borosilicate
Amagilavu erabha2
2
Throw down ferric hydroxide
Throw down ferric hydroxide
Mix 320 ml of the ammonia water with 800 ml of distilled water. Dilute 200 ml of ferric sulphate solution with 800 ml of distilled water and add it slowly, stirring briskly, until the mix smells faintly of ammonia. Leave 2 hours, stirring now and then.
Izinto zokwakha zalesi sinyathelo:
Isixazululo se-Ferric Sulphate200 mlAmathuluzi adingekayo:
Amanzi AcwengisisiweIbhikha Le-borosilicate
Induku Yengilazi Yokugovuza3
3
Filter and wash
Filter and wash
Pour onto a calico filter. When drained, wash the brown ferric hydroxide with distilled water until the washings are free of sulphate.
Amathuluzi adingekayo:
Indwangu kakotini ebanzi yokuhluzaAmanzi Acwengisisiwe4
4
Dissolve in citric acid
Dissolve in citric acid
Dissolve 80 g of citric acid in 80 g of distilled water and warm it on a water bath. Stir in the drained hydroxide until nearly all of it has dissolved and the acid is saturated.
Izinto zokwakha zalesi sinyathelo:
I-citric acid80 gAmathuluzi adingekayo:
Amanzi Acwengisisiwe
Ibhodwe elikhulu (elingezansi, lokugeza ngamanzi)Ibhikha Le-borosilicateInduku Yengilazi Yokugovuza
Isikali sesilinganiso5
5
Add ammonia and filter
Add ammonia and filter
Let it cool, add 110 ml of the ammonia water and filter through flannel, adding a little distilled water if needed.
Amathuluzi adingekayo:
Ifulaneli YoboyaAmanzi Acwengisisiwe6
6
Dry to scales
Dry to scales
Evaporate to a syrup, keeping a very slight smell of ammonia. Spread thinly on glass plates and dry below 37.8 °C (100 °F). Lift off the flakes and keep them in a dark, closed jar.
Amathuluzi adingekayo:
Ipuleti LokuhwamukaIbhodwe elikhulu (elingezansi, lokugeza ngamanzi)
Ushidi wengilazi
Ithemomitha
Amajeke Engilazi Emnyama Anezivalo Ezingangeni MoyaIzinto
3- Isibambeli
- Isibambeli
- 80 gIsibambeli
Amathuluzi Adingekayo
12- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
Le blueprint yenza
Ama-blueprint ahlobene
Lama-blueprint abelana ngolwazi — amasu, izinto noma izimiso
CC0 Isizinda Somphakathi
Le blueprint ikhishwe ngaphansi kwe-CC0. Ukhululekile ukukopisha, ukuguqula, ukusabalalisa, nokusebenzisa ngaphandle kwemvume.
Sekela uMenzi ngokuthenga imikhiqizo nge-Blueprint yabo IKhomishane Yomenzi kumiswe ngabathengisi, noma dala inguqulo entsha yale Blueprint bese uyifaka njengoxhumaniso ku-Blueprint yakho ukuze wabelane ngemali engenayo.