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Ferric Ammonium Citrate: Ferric Hydroxide Dissolved in Citric Acid and Ammonia
Charlie

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Charlie

18. Ukwakira 2026DE
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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).
Hagati
2 days

Amabwiriza

1

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.

Ibikoresho by'iyi ntambwe:

Umuti wa amoniyake wa 25-28 %Umuti wa amoniyake wa 25-28 %190 ml

Ibikoresho bikenewe:

Amazi YatunganyijweAmazi Yatunganyijwe
Igikombe cya BorosilikateIgikombe cya Borosilikate
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu
2

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.

Ibikoresho by'iyi ntambwe:

Umuti wa feri sulfateUmuti wa feri sulfate200 ml

Ibikoresho bikenewe:

Amazi YatunganyijweAmazi Yatunganyijwe
Igikombe cya BorosilikateIgikombe cya Borosilikate
Akati k'Ikirahure ko KuvangaAkati k'Ikirahure ko Kuvanga
3

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.

Ibikoresho bikenewe:

Igitambaro cy'ipamba kinini cyo kuyungururaIgitambaro cy'ipamba kinini cyo kuyungurura
Amazi YatunganyijweAmazi Yatunganyijwe
4

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.

Ibikoresho by'iyi ntambwe:

Asidi ya limoniAsidi ya limoni80 g

Ibikoresho bikenewe:

Amazi YatunganyijweAmazi Yatunganyijwe
Isafuriya nini (iyo hasi, y'amazi ashyushye)Isafuriya nini (iyo hasi, y'amazi ashyushye)
Igikombe cya BorosilikateIgikombe cya Borosilikate
Akati k'Ikirahure ko KuvangaAkati k'Ikirahure ko Kuvanga
Umunzani w'ibiroUmunzani w'ibiro
5

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.

Ibikoresho bikenewe:

Ubudodo bw'ubwoya bwa flaneliUbudodo bw'ubwoya bwa flaneli
Amazi YatunganyijweAmazi Yatunganyijwe
6

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.

Ibikoresho bikenewe:

Isahani yo kumishaIsahani yo kumisha
Isafuriya nini (iyo hasi, y'amazi ashyushye)Isafuriya nini (iyo hasi, y'amazi ashyushye)
Ikibaho cy'ikirahureIkibaho cy'ikirahure
Igipima UbushyuheIgipima Ubushyuhe
Amacupa y'ikirahure cyijimye afite imifuniko idapfaAmacupa y'ikirahure cyijimye afite imifuniko idapfa

Ibikoresho

3

Ibikoresho bikenewe

12

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.

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