Mossman Gorge, Queensland, Australia

NuSpark Technical Information


Length45 mm
Diameter 27 mm
Weight11.4 g
Density44 g/cc
Chamfer4 mm
Recovery after 24 hours>97%
Torsion moment> 75 da
Torsion angle>60
Water AbsorptionNil
Moisture contentNil
ColourAs ordered
Extraction break torque (At 5°C, insertion depth 22 mm)17.5
Ejection without muselet (Wine at 10g/L CO2, 20°C)> 1 minute
Retention of CO2 after 12 Months (Wine at 10g/L C02, storage upright at ambient temperature)>95%
Coating FDA - EU Compliant, food-grade silicone

Long-term Trial Results

The NuKorc R&D team conducted a trial in 2002 to test NuSpark's ability to maintain sparkling wine in good condition after bottling.

Bottles of sparkling red wine were packaged on May 2nd, under commercial conditions. Two types of closures were used:

  • NuSpark synthetic closure for sparkling wine.
  • Reference 3 agglomerate cork closures with two natural cork discs. These closures were selected at random from the stock held by the bottler.

Representative bottles sealed with both closures were placed into storage in an upright position at ambient temperature. An initial analysis of six bottles sealed with each closure was carried out one day after bottling for the following key wine quality parameters:

  • Free sulphur dioxide.
  • Total sulphur dioxide.
  • Carbon dioxide content (as indicated by bottle pressure).
  • Browning (as indicated by absorbance at 420 nm).

Six further bottles sealed with each closure were tested for each of these parameters at 3, 6, 9, 12, 15, 18, 21 and 24 months after bottling.

In addition, representative bottles of the wine sealed with NuSpark and cork were tasted at 14 months after packaging. In a separate trial, NuSpark closures were tested for break torque and ejection from the bottle after removal of the muselet.

NuSpark performed exceptionally well for all testing parameters. For more information please contact us.

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