UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Extra Virgin Olive Oil: Cold Pressed and Tested for Free Acidity
Lemone (Wikimedia Commons) · CC BY-SA 4.0
TheChef

Yaremwe na

TheChef

14. Ukwakira 2026DK
20
0
0
0
0

Extra Virgin Olive Oil: Cold Pressed and Tested for Free Acidity

Extra virgin is the top grade of olive oil: pressed by mechanical means only, kept cool, and with no more than 0.8 % free acidity. Press fresh olives the day they are picked, keep the paste under 27 °C, and check the oil by titration: a few millilitres of weak caustic soda tell you its grade. The picture: a water-driven olive mill with edge-running stones, drawn by Bartolomeo Gandolfi of Porto Maurizio, printed in Rome in 1793.
Hagati
A day

Amabwiriza

1

Pick and press the same day

Use sound olives, not overripe or bruised, and work them within hours of picking. Wash off leaves and dust.

Ibikoresho by'iyi ntambwe:

Imizeyituni yeze (mishya)Imizeyituni yeze (mishya)10 kg
AmaziAmazi5 litiro

Ibikoresho bikenewe:

Umunzani w'ibiroUmunzani w'ibiro
2

Crush to a paste

Crush the olives, stones and all, to a paste in a stone mortar or under a rolling stone.

Ibikoresho bikenewe:

Isekuru y'ibuyeIsekuru y'ibuye
IbuyeIbuye
3

Stir the paste, keep it cool

Stir the paste slowly for 20–30 minutes so the oil droplets join. Keep it under 27 °C: no hot water, no warming.

Ibikoresho bikenewe:

Ikiyiko Kibajwe mu Giti KimweIkiyiko Kibajwe mu Giti Kimwe
Igipima UbushyuheIgipima Ubushyuhe
4

Press and settle

Wrap the paste in cloths and press it. Let the liquid stand in glass jars until the oil floats clear over the water, then draw the oil off.

Ibikoresho bikenewe:

Umwenda (wo Kuyungurura)Umwenda (wo Kuyungurura)
IgikanishwaIgikanishwa
Amacupa yicaza (y'ikirahure)Amacupa yicaza (y'ikirahure)
5

Test the free acidity

Make 0.1 M caustic soda: 4 mL of the 10 % solution made up to 100 mL. Warm 50 mL ethanol with a few drops of phenolphthalein and add caustic soda until just pink. Weigh in 10 g of oil, shake, and titrate from the burette until the pink lasts 30 seconds. Read the grade in the next step.

Ibikoresho by'iyi ntambwe:

Etanoli - urwego rw'ubushakashatsi, 95 %Etanoli - urwego rw'ubushakashatsi, 95 %50 ml
Hidorogiside ya sodiyumu, umuti wa 10 %Hidorogiside ya sodiyumu, umuti wa 10 %4 ml

Ibikoresho bikenewe:

Umunzani w'ibiroUmunzani w'ibiro
Ikirahure cya ErlenmeyerIkirahure cya Erlenmeyer
Bureti (y'ikirahure)Bureti (y'ikirahure)
Urubaho rushyushyaUrubaho rushyushya
Amadarubindi yo Kwirinda IbinyabutabireAmadarubindi yo Kwirinda Ibinyabutabire
Umuti werekana wa fenolufutaliniUmuti werekana wa fenolufutalini
6

Free acidity

Gupakira ikaye ya Jupyter…
7

Bottle it dark

Oil at 0.8 % or under keeps the extra virgin name only if it also tastes clean and fruity. Store it in dark glass, full and closed, out of the light and heat.

Ibikoresho bikenewe:

Icupa ry'ikirahure cy'umuhondoIcupa ry'ikirahure cy'umuhondo
8

Limits

The grade limits and the 27 °C cold-press mark are from the IOC grades as given by Wikipedia; the titration is the standard free-fatty-acid test (AOCS Ca 5a-40). Quantities are ours. The official grade also needs a tasting panel, which one maker cannot provide.

Ibikoresho

4

Ibikoresho bikenewe

14

Iki gishushanyo gikora

Thumbnail
Agateganyo

Amavuta ya elayo asukuye cyane

Free

301
0

Blueprint zijyanye

Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame

Greek Olive Oil — Pressing Olive Oil with a Trapetum Mill

Greek Olive Oil — Pressing Olive Oil with a Trapetum Mill

na TheChefDK

Ibiribwa

81
0
0
0
0
0
Ethanol 95 %: Wine Distilled, Rectified and Dried over Potash

Ethanol 95 %: Wine Distilled, Rectified and Dried over Potash

na CharlieDE

Kamere

20
0
0
0
0
0

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.

Ibiganiro

(0)

Injira kugira ngo ujye mu biganiro

Gutegura ibitekerezo...