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Barrel toasting - photo from Tonnellerie Radoux

Introduction

Range

OAK SCAN

AIM: TO CORRECT THE HETEROGENEOUSNESS OF THE LEVEL OF TANNINS DURING THE BARRELS PRODUCTION

How does it work ?

Radoux OakScan® is a system of rapid analysis, stave by stave, based on Near Infra red Spectrometry.

Each stave is scanned when entering the production process and is marked with the index of the category of tannic potential to which it belongs. This polyphenolic index is calculated according to a confidential formula using the OakScan®measurements and estimates the polyphenolic richness of the wood between indexes 0 and 100. It is a linear combination of the values of the reference chemical indexes (DO280, Folin Ciocalteu and total Ellagitannins). So from a pallet of rough staves of variable composition (Diagram 1), we obtain three selections of barrels, each of different composition but all of them homogeneous.

Diagram 1: heterogeneity of tannic potential of barrels produced without oakscan control

A dot represents the average tannic potential of each barrel made form arround 30 staves with no OakScan® grading.

What does it do ?

Radoux OakScan® is currently used to guarantee the homogeneity of tannins in barrels, in addition to the traditional methods of selecting wood. As the staves are being prepared, they are marked and graded into 3 selections :

Diagram 1: heterogeneity of tannic potential of barrels produced without oakscan control

A dot represents a barrel made from a batch graded with the help of OakScan® of around 30 staves of the same selection.

All the woods over the polyphenolic index of 67 are used for spirits barrels to ensure they have a maximum tannic impact.