Monthly Archives: September 2012

Today’s Wine Word: Whole-Cluster Pressing

White_grapes

Since white varieties are the main thing being harvested at this early point in the annual crush, it’s a good time to talk about whole-cluster pressing. You’ll see references to it in the wine maker notes for high-end white wines. 

In white wine production, to keep the flavors delicate and free of astringency only the juice is fermented. So, standard procedure is to run the freshly-picked clusters through a machine that quickly pulls off the stems and breaks the grape skins open – a stemmer-crusher. 

Then the crushed grapes are sent to the press, which is like a giant strainer. A whole lot of juice runs off into a drip pan on its own. When the flow begins to let up, pressure is applied to increase the yield. And, away the juice goes to a tank or barrel to be fermented. 

That’s good. 

But, high-quality whites often forgo the stemmer-crusher to be pressed immediately. I know it sounds like you save time, by skipping a step, but it actually slows the whole thing down significantly a bit. From a cellar worker’s perspective, it’s a pain. Continue reading

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