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4th July 2016, 08:05 AM
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#4 |
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Member
Join Date: Jan 2008
Posts: 1,429
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I read somewhere (can't remember where) that this black, sooty surface film was deliberately applied in Africa, as a type of preservative...
Its a similar surface film/residue to that found on the inside of traditional African hut roofs, being formed from the cooking fire. |
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