These data are global average values for semi-manufactured stoppers. In our laboratory we examine samples of manufactured products and maintain the readings they yield in control forms. When material is shipped, a copy of the test results is sent with it. The company reserves the right to modify, with prior notice, the technical specifications presented in this catalog. This document is meant to be of an orientational nature concerning our product and manufacturing methods, and is complemented by the information supplied with the ordered product.
Composition: Disc (natural cork, average thickness 6 mm) + agglomerated cork body (grain size from 3 to 6 mm / average density 70-75 kg/m3) + disc (natural cork, average thickness 6 mm)
Measurements: Diameter: from 23 to 28 mm / Length: between 40 and 44 mm (standard measurements; manufacture of other measurements to order)
Weight: Average may vary, according to diameter, between 5 g (Ø 24), 5.7 g (Ø 26), and 6.6 g (Ø 28), with a length of 40 mm
Stopper density: Between 260 and 280 kg/m3
Moisture: Between 4 and 8 %
Rupture strength: Between 25 and 35 kg
Rupture angle: Between 45 and 55º
Vertical compression/recovery: Applying a mass of 28 kg for 30 seconds, we obtain a 99 % recovery in the same time interval
Horizontal compression/recovery: Applying a mass of 80 kg for 30 seconds, we obtain a 97 % recovery in the same time interval
Water absorption after 10 minutes boiling: between 8 and 15 %
Organoleptic analysis: free of foreign flavors and odors
Microbiological analysis: Bacteria < 105 CFU/stopper, N.C.S. Standard / Filamentous fungi and yeast < 106 CFU/stopper. N.C.S. Standard