Did you ever create a wine that seemed more viscous than your typical wine, or which may have exhibited heavier fruity odors, or perhaps a solvent-like smell? The culprits may well be higher alcohols, also called fusel oils; all wines contain some at various concentrations. Higher alcohols in small concentrations can contribute positive aromatic characteristics to wine; however, at high levels they can impart off-aromas or mask other aromas, or change the…
Fining of wine is the addition of one substance to remove another. It is a diverse subject with several classes of materials involved in its use and lots of different intended outcomes.