Again, the boiler is brought quickly up to temperature and the power reduced to about 750 - 1000 Watts. This lower power is very important, because the fractionating column exists to create the opportunity for exchange between vapor and refluxing condensate. The tradeoff between speed and quality is much more pronounced in a fractionating still.
The foreshots begin to appear at about 65-70°C (149-158°F) and are again discarded. The quantity of heads drops to 250-300 ml because the fractionating column produces purer fractions.
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