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natural cork

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                                              • Raw materials are selected according to rigorous physical criteria.
  • The cork planks are boiled in a new generation stainless steel boiler with a continue water filtration system and “flash détente” column.
  • Vapour-extraction treatment
  • Traditional peroxide cleaning system
  • Physical and chemical controls in all production steps.

 

 

 Characteristics  Technical specifications   Technical specifications
 Superior range  Standard range  Basic range

Visual characteristics (for 125 stoppers)

 ≥ 90% of the asked choice  < 10% of the inferior choice  < 10% of the inferior choice  < 10% of the inferior choice
 Dimensional characteristics (for 32 stoppers)

Length (mm) L ± 0,7

Diameter (mm) D ± 0,5

Ovalization (mm) ≤ 0,7

Chamfer (mm) 1,5±0,5

NQA 4 (A3/R4**)

NQA 2,5 (A2/R3)

NQA 4 (A3/R4)

NQA 4 (A3/R4)

NQA 4 (A3/R4)

NQA 4 (A3/R4)

NQA 6,5 (A5/R6)

NQA 4 (A3/R4)

NQA 6,5 (A5/R6)

NQA 6,5 (A5/R6)

NQA 6,5 (A5/R6)

NQA 6,5 (A5/R6)

 Physical and chemical characteristics  Humidity (%) 6,0 ± 2,0  NQA 4 (A2/R3)  NQA 4 (A2/R3)  NQA 4 (A2/R3)
 Dimensional (%)  100%>90%  100%>90%  100%>90%
 Capillarity  No capillary ascent  No capillary ascent  No capillary ascent
 Liquid watertightness (%)  100% >1,2 bar  100% > 0,9 bar

100% > 0,6 bar

 Extraction force (daN)  15<100%<40  15<100%<40  15<100%<40
 Peroxide residual (mg/stopper)  ≤ 0,1  ≤ 0,1  ≤ 0,1