Colmated Cork Stopper

The Colmated stopper is a natural stopper with great porosity. It undergoes an aesthetic procedure which improves its appearance, its mechanical characteristics and bottling performance.



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Physical - Mechanical
Characteristic Specification
Length l ± 1,0 mm
Diameter d ± 0,5 mm
Ovalisation ≤ 0,7 mm
Moisture 4% — 8%
Extraction Force 20 — 40 daN


Chemical
Characteristic Specification
Peroxide Content ≤ 0,1 mg/stopper
Dust Content ≤ 3 mg/stopper


Visual
Characteristic Specification
Visual Grade Reference ≥ -5%


OTR (Oxygen Transfer Rate)
Characteristic Specification
12 Months 2,5 mg/stopper
24 Months 2,6 mg/stopper


(1) deviation with regard to reference sample
Stopper sampling methods as per ISO 2859 standard — Cork Products