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July 2008
Excessive Copper Fining of Wines Sealed Under Screwcaps
Identifying and Treating Reductive Winemaking Characters
by Geoff Cowey
The Australian WineResearch Institute's (AWRI) industry services team provides winemaking consultancy and technical problem solving services to the Australian wine sector. The team is in the unique position to observe sector-wide trends on a year-by-year basis. One trend we have observed since the larger acceptance and use of the screwcap closure is an increase in copper additions to wines immediately prior to bottling, regardless if any reductive characters are detected in the wine. This is rep...
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