[TN] Backlog notes (CRB Pif & Rotgipfler)

Au contraire, Larry. If anything, wines age slower under screwcap. All the studies I've seen have shown less oxygen ingress than cork with far greater consistency bottle to bottle. Apart from some reports of reduction under screwcap, there are no concerns about aging them.

Mark Lipton

Stelvins are glass aren't they. If their is no oxygen exchange will there be any aging?

No, Stelvin closures are just the common metal screwcaps.

Then what are the glass closures called? I have run into these several times now.

Sorry, I don't know. I can't remember ever seeing glass closures.

"Ken Blake" skrev i melding news: snipped-for-privacy@4ax.com...

Glass stoppers, see this:

Anders

That;s why they refer to wine aged under Stelvin as "Peter Pan" wines. They never get old...

The most common brand of glass stopper is the Vino-Lok, made by Alcoa IIRC. I mostly see it on lower-end German Rieslings, but I'm sure that others use it, too. No idea about the aging curve of wines sealed that way, but I'd guess that its oxygen permeability is even lower than that of screwcaps. They resemble fire-polished ground glass joints with an O-ring seal, and we use similar seals in the lab when we want something close to a hermetic seal.

Mark Lipton

Yes, this is what I found on two bottles. I had never seen it before.

Sorry for chiming in: Do you mean that you have seen another type of glass stopper, just not this one, or no glass stopper at all?

To the best of my knowledge, this type (Vino-Lok) is the only one, and it's used in Austria and Germany since around 2003, but I'd estimate the penetration rate well below 5% for them. (Screw-caps in Austria, otoh, have a market share of over 70% of the whole production.)

M.

Sorry to have confused you. I've seen no glass stoppers at all.

Yes, this was on a Cote du Rhone and is a glass stopper.