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Christian Butzke
Enology Professor
www.indianaquality.org
www.indianaquality.org
Amanda Stewart
Skin Contact Time
... our Traminette had
skin contact for 4 hours ...
When considering skin extraction, the contact
time is as important as the temperature of
the incoming fruit.
Contact time for
t1 = 24 hours at 39°F
is roughly equivalent to
t2 = 7 hours at T = 59°F
Assumed terpene/tannin extraction kinetics:
t2 = t1*1/(3(T-39)*0.056)
Terpene Degradation
ISSUES
Pre-mature aging?
=> No aging potential
Enzyme vs. natural acid hydrolysis?
=> Release of non-varietal aromas
Removal of stable anthocyanin-glucoside?
Additional bentonite fining needed!
Treatment
• Esters– Caprate C10– Laurate C12– Pelargonate C9– Caprylate C8– Myristate C14
Fermentation “Aroma”
Expect hydrolysis in 6 weeks
to 6 months!
New Winery Pests?
© Vernon L. Singleton: Principles and Practices of Winemaking
Oxygen Management
Bottle Storage and Aging
Whites better off at 32 to 40°F?
www.indianaquality.org
www.indianaquality.org
www.indianaquality.org
www.indianaquality.org
www.indianaquality.org
