The Simple Reason Most Bourbon Is Distilled Twice - Tasting Table
Briefly

The article discusses the significance of double distillation in whiskey production, emphasizing its role in enhancing the spirit's purity, flavor, and alcohol content. The process features two main distillation steps: the first significantly raises the alcohol level, while the second further refines the spirit, leading to the production of white dog or new make spirit. Craft distilleries often use copper pot stills, contrasting with larger distilleries that utilize column stills, and highlight the meticulous nature of whiskey production to ensure compliance with strict aging regulations.
In order to produce the best, cleanest whiskey possible, it is often necessary to distill the spirit at least twice. A double distillation increases the alcohol content, removes impurities, and concentrates and refines the flavors of the spirit.
The process of double distillation consists of two steps: the first raises the alcohol level to around 25%-30%, while the second further elevates the alcohol and purifies the spirit.
At this stage, masters distillers separate the heads and tails, retaining only the middle portion, resulting in a clear spirit known as white dog or new make spirit.
While larger distilleries use column stills for initial distillation, most craft producers opt for traditional copper pot stills, emphasizing a batch system approach.
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