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Traditional

Castile

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The oils

Oil Share
Olive Oil (virgin / refined / olive oil) 100.0 %

How it is made

Process Cold process
Alkali NaOH
Superfat 5 %
Water 38 % of the oils
Iodine value 85
INS 106

What the numbers say

Hardness 17 below 29–54
Cleansing 0 below 12–22
Conditioning 81 above 44–69
Bubbly lather 0 below 14–46
Creamy lather 17 16–48

Computed from the fatty acids of the fats above. The bands are what the craft has settled on, not chemistry — a bar outside one is not wrong.

Try it differently

11 variations

The same soap with one thing moved. Each opens in the calculator ready to change again.

Where these proportions come from

Soft for weeks and worth the wait. Every quality table calls this too soft, which says more about the table than the soap.

The name has meant 100 % olive soap since the Castilian soaps of the 12th century; the single-oil composition is what defines it.

A canonical formulation: the proportions the craft has settled on for this kind of soap. Not transcribed from a document, and not copied from anywhere.

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