Dimensional Control
Dimensional characteristics are specified by the norm ISO 3863 and, as such, the length tolerance of +/- 0.4 mm.

The Measurement of Humidity
The humidity of corks is of fundamental importance for the storage and microbial activity, as well as the mechanical characteristics of the cork. The humidity tolerance is between 5.5 and 7.5%.

Density Control
The density tolerance is between 140 and 200 kg/m3.

Microbiological Analysis
Tolerance: Bacteria < 20 Cfu/cork, Mold < 10 Cfu/cork

SPME Analysis and Sensory Evaluation
Evaluate the presence of TCA, off odours and colour irregularities.

Control of Cork Dust
The surface coating, which can block the residual dust and humidity (a dry cork will more easily shed lenticellular contents) influences the quantity of dust which can be freed from the cork. Tolerance is < 3 mg/cork.

Determination of Cork Capillary
Tolerance < 1.5 mm of height on the side of the cork.

Cork Weight
Tolerance depending on the size: 45x24 mm < 3.5g, 49x24 mm < 4.0 g.