Inside of wine vat

Inside of wine vat

A flashlight illuminates the inside of the vat into which the wine press drained. On the inner surface of the vat, below its rim, UCLA chemists found evidence of the plant pigment malvidin, the substance that makes wine stains so difficult to remove from fabric today. The bottom of the vat also is covered with dark gray organic residues.
(Photo credit: Gregory Areshian)

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