In white wines, this is generally a trace of colourless tartaric acid which has no taste and is in no way dangerous. On the other hand, in red wines, the same deposit generally contains a bitter tannin and a pigment; it should be left as it is in the bottle so as not to disturb the wine.
I am passionate about wine, history and art. As an experienced wineo, I have deep respect for those who have the skills to blend art and science into a bottle of great wine; I truly don’t know how a vintner can possibly tango with Mother Nature all year...
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