French chemists analyse how the toasting of oak staves used to make wine barrels affects the chemical composition of the wood and the final uncorked product
The choice of oak barrel in which a wine will be matured has a profound effect on the bouquet, flavour, and colour of the final uncorked product. How and to what extent a cooper toasts the oak staves prior to making a barrel will in turn influence the qualities of the barrel. However, there is a small risk of toxic and potentially carcinogenic polyaromatic hydrocarbons (PAHs) and dioxins being formed during the toasting process. These might ultimately leach into the wine.
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