Heads, hearts and tails are the fractions a distiller separates during a run. The heart is the portion selected for the intended spirit; earlier and later fractions are managed separately. The cut points are process and product decisions, developed through trials and assessment of the resulting spirit.
Fractions change throughout the run
A fermented charge contains water, ethanol and other compounds. Their distribution in the collected spirit changes during distillation. The fractions are mixtures, not containers holding one pure compound each.
The practical task is to collect in a way that lets you understand those changes and choose a repeatable product. Your feedstock, fermentation, still, operating settings and intended style all contribute to the result.
Define the spirit before choosing the cut
A vodka and a characterful whisky ask different questions of the distillation process. Establish what you want to retain, then compare the fractions and blends produced by a documented run. Use sensory work to develop the recipe and appropriate analysis to assess composition.
Start with the University lesson on tasting fractions and making cuts. The whisky, fruit-spirit and vodka guides connect that work to different production targets.
Why methanol is not a simple heads-cut question
A compound’s pure boiling point does not, by itself, establish where it appears in a fermented mixture. Experimental coffee-cherry-spirit research measured methanol in the collected fractions and found it increased from heads through hearts to tails in that study. Removing an initial fraction is therefore not evidence that the remaining spirit is methanol-free. Read the experiment and its specific conditions.
Sensory cut selection and composition testing answer different questions. Where a product requires confirmation of methanol or other constituents, use the appropriate analytical testing and applicable product requirements. A pleasant aroma is not an analytical measurement.
Turn the result into a repeatable process
- Record the charge, fermentation history and equipment configuration.
- Keep the operating settings and collection sequence with the batch record.
- Evaluate comparable samples and document the blend selected as the product.
- Confirm the required composition and product checks.
- Repeat the process and assess whether the result meets the intended standard.
Reflux and liquid management explain controls that influence separation and collection. The automation guide shows how a developed collection strategy fits into recipe operation. The distiller still defines and evaluates the product.
