Here's what I found on the "KT" issue.
KT is a sweet, candylike taste/smell which is thought to originate from nonfermentable sugars formed during the process of pasteurization and concentration of grape juice for kits. It has been described as "like grape Jolly Ranchers". There is a wide range in the perception of KT. Some people say it doesn't exist. Some find it in most every kit. It seems to be that some are sensitive to it, some are not.
Some people say that adding raisins during fermentation diminishes it. It is said to fade and eventually disappear with aging, and barrel aging is said to knock it out quickly.
I don't believe that it really gets knocked out, but it probably gets covered up by the oak.
It's possible thatit is a product of the effect on the grape sugars caused by the pasteurization, concetration andextraction processes thatkits undergo.
Biologists tell me yeast doen not digest some long chain complex sugars, like those resulting from concentration / pasteurization.
Maybe kits with grape skins reduce the impact of the KT by reducing the complex chains to begin with.
Another possibility is furaneol. In addition to being perceived as cotton-candy and caramel, it is a taste component of strawberries (it is also known as strawberry furanone). It also occurs naturally in many hybrid grapes. (If it forms in kit production, it would have to be an artifact, since we start with vinifera grapes.) But here's the interesting part: "The influence of the vinification method on furaneol levels has been studied. In all cases, vinification with skin contact leads to a decrease in furaneol concentrations."
(
http://www.ajevonline.org/cgi/content/abstract/46/2/181)
Someone posted that Stavin Hungarian oak cubes at 2 oz per 6 gal. carboy for 3 months would correct.
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Edited by: Beachdragon007