Category Archives: SOP

Copper Sulfate Additions

By clyde | Published: November 29, 2007
Legal limit in the USA of copper sulfate ADDITIONS to wine has been raised recently from 0.5 ppm to 6.0 ppm, but the residual limit is still 0.5 ppm. Materials Authorized for Treatment of Wine or Juice This ruling is a key clue in what happens with copper in wines with H2S or mercaptans: if [...]
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Sulfite Additions

By clyde | Published: November 28, 2007
Just a quick note on sulfite additions post fermentation. If sulfite was added at crush, a double dose of sulfite is necessary post fermentation to achieve the desired free SO2 level. The formula I’ve always used for sulfite additions is: 0.0076 X gallons X desired increase in ppm = grams of addition pms.
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Crush

By clyde | Published: November 28, 2007
The preferred method of loading the crusher is via harvest bins and the tractor. The tractor cannot tip the bins completely over, but just enough to allow the clusters to be raked into the hopper. This allows the operator to meter the volume of grapes to match the speed of the hopper (rate will be [...]
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