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ROSA-Treated Twin Top® Stopper

The Twin Top ® stopper is a technical cork stopper that is ideal for fruity wines and is recommended for wines not intended for long bottle aging. Comprising an agglomerated body and a disc of natural cork at each end, it can be used on the same bottling lines as natural cork stoppers.

Tests Characteristics Specifications
Physical - Mechanical Length l ± 1,0 mm
  Diameter d ± 0,4 mm
  Ovalisation ≤ 0,3 mm
  Moisture 4% - 9%
  Specific Weight 250 - 330 Kg/m³
  Extraction Force 20 ± 40 daN
Physical - Chemical Peroxide Content ≤ 0,1 mg/cork
  Dust Content ≤ 3 mg/cork

Selection and Storage of Cork Stoppers

  • Amorim & Irmãos can calculate the required cork diameter from the design of the neck of your bottle, the characteristics of the wine and the corking conditions.
  • A wine with high CO2 may require a cork with a greater diameter than normal.
  • Order your corks for immediate or quick use. These stoppers should be used within 6 months of the date of manufacture.
  • Store in a well-ventilated room with controlled temperature between 15ºC and 25ºC and 50% to 70% humidity.

Corking Conditions

  • Ensure any dust is removed before corking.
  • Ensure the cork is compressed slowly, to a diameter no less than 15,5 mm.
  • Ensure insertion of the cork is as quick as possible.
  • For standard bottlenecks, the cork should be inserted to 1 mm below the top of the neck.
  • Minimize moisture on the inside of the bottleneck.
  • Headspace at 20ºC should be at least 15 mm.
  • Internal pressure after corking should not exceed 1.2 bar. Vacuum bottling is recommended.

Equipment Maintenance

  • Maintain the corker jaws free of nicks and signs of wear.
  • Ensure proper alignment of plunger and location ring.
  • Ensure corking machine operates smoothly, especially during compression.
  • Clean all cork-handling surfaces regularly with chlorine-free products.
  • Ensure the equipment is suited to the cork used.

Storage and Transport of Wine

  • After bottling, the bottles should be kept in an upright position for at least 10 minutes.
  • Ideal bottle storage conditions are 15-25ºC at 50%-70% humidity.
  • Keep the wine cellar free of insects.
  • Bottles should be transported in an upright position.