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Rapeseed (Colza) Oil: Ripened, Threshed and Pressed
Uhooep (Wikimedia Commons) · CC BY-SA 4.0
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14. Oktoba 2026FI
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Rapeseed (Colza) Oil: Ripened, Threshed and Pressed

Colza, or rape, is a cabbage relative whose small seeds give an oil that lit the lamps of France and Belgium. Andrew Ure (1839) notes the seed yields oil only in proportion to its ripeness, so the plants are cut a little early, before the pods shed, and left to finish ripening in heaps before threshing. The pressing is the same as for linseed oil. The picture: a rapeseed (colza) field in flower.
Mwanzo
A day of pressing

Maagizo

1

Ripen, thresh and winnow

Let the cut plants finish ripening in an airy heap, thresh out the seed, winnow off the chaff and sift it.

Vifaa kwa hatua hii:

Mbegu za rapaMbegu za rapa3 kg

Zana zinazohitajika:

UngoUngo
UngoUngo
2

Dry the seed

Spread the seed thinly in the air to dry before pressing (Ure).

Zana zinazohitajika:

Jamvi la kukaushiaJamvi la kukaushia
3

Press, settle and decant

Press the dry seed in the screw press, let the oil settle and decant it clear, exactly as for linseed oil. Keep the pressed cake: Ure notes it fattens cattle.
4

Filter and bottle

Pour the settled oil through a paper filter in a funnel into clean bottles, and keep it cool and dark.

Zana zinazohitajika:

Faneli ya jikoniFaneli ya jikoni
Vichujio vya kahawa / karatasi ya kuchujaVichujio vya kahawa / karatasi ya kuchuja
Chupa ya kioo cha kahawiaChupa ya kioo cha kahawia

Vifaa

1

Zana Zinazohitajika

6

Mchoro huu unatengeneza

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Mafuta ya taa

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Mafuta ya kanola

Free

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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

Cold-Pressed Linseed Oil

Cold-Pressed Linseed Oil

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