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What are Those Half-bottle Snowflakes?

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Clint Hall

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What are Those Half-bottle Snowflakes?

by Clint Hall » Sun Jul 03, 2011 7:37 pm

Robin's thread about bottle stoppers gives me an excuse to ask a frivolous question about something that happens to my reused 375s. I use them again and again to overnight leftover wines from 750s, and after emptying the wine in these half-bottles I fill them with hot water and shake the hell out of them fifty or a hundred times or so before letting them dry out so they can be used again. That presents no problem. But once in a great while I'll happen to fill one with water and then forget it for a few days. When that happens, and I go through the shaking procedure and then inspect the water inside the bottle, I find a few almost imperceptibly small silvery flakes floating around. Nothing I do, such as shaking and brushing the inside of the bottle, will get rid of them. As 375s aren't all that hard to come by I just throw that one way, so there is no problem, but I've always wondered what those darned flakes are.
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Re: What are Those Half-bottle Snowflakes?

by JuliaB » Sun Jul 03, 2011 7:44 pm

Residual tartrates?

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David M. Bueker

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Re: What are Those Half-bottle Snowflakes?

by David M. Bueker » Sun Jul 03, 2011 7:45 pm

Indeed, sounds like tartrate crystals to me.
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Oliver McCrum

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Re: What are Those Half-bottle Snowflakes?

by Oliver McCrum » Tue Jul 05, 2011 8:18 pm

If it's after the bottle has been rinsed it must be the minerals from your tap water. Do you have 'hard' water?

I can't imagine it would do the wine any harm.
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