NDtech® Cork Stopper

The world’s first natural cork with a non-detectable TCA guarantee

NDtechⓇ is an individualized quality control screening technology, developed by Amorim, for natural cork stoppers that delivers the world’s first natural cork with a non-detectable TCA guarantee.*

*releasable TCA content below the 0.5 ng/L quantification limit; analysis performed in accordance to ISO 20752.




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


OTR (Oxygen Transfer Rate)
Characteristic Specification
24 Months 2,6 mg/stopper
36 Months 2,7 mg/stopper
60 Months 2,8 mg/stopper


*releasable TCA content below the 0.5 ng/L quantification limit; analysis performed in accordance to ISO 20752.

**OTR values established according to the method described in “Lopes, P.; Saucier, C.; Glories, Y. Nondestructive colorimetric method to determine the oxygen diffusion rate through closures used in winemaking”. J. Agric. Food Chem. 2005, 53, 6967-6973