How is the charring level measured?

The charring level of a barrel is typically measured on a scale of 1 to 5, with each level representing a specific degree of char applied to the interior of the barrel. This grading system helps distillers and cooperages ensure consistency in the charring process, which significantly impacts the flavor profile and characteristics of the bourbon produced.

Using this scale allows for a standardized way to communicate and implement the desired char, reflecting the depth and intensity of flavors that the barrel interacts with during the aging process. A lighter char might impart different flavors compared to a deeper char, such as vanilla, caramel, or more robust smoky notes.

Other methods, such as measuring by proof units, temperature, or aging in months, do not directly apply to the specific process of measuring char levels in barrels. These factors may influence the overall production of bourbon but do not provide a quantifiable measurement of how charred the barrel interior is.