https://twitter.com/jwalkermobile/status/1682766515668385794?s=46&t=fjjgP8Qqb8TFqleOnOeJfA
There is no difference in initial and prolonged oxygen transfer rates from Diam 10 and Diam 30 according to the manufacturer. The only difference is the guarantee (10 yrs, 30 yrs) and the priceâ and important marketing considerations. Most people think the numbers relate to the years that the closure will be viable (the company disputes that but the narrative is there, forcing vignerons/winemakers to strongly consider the premium optionâŚ) https://nuventure.eu/content/uploads/docs/corks/diam/presentations/2019%20-%20OIR-OTR%20-%20GB.pptx.pdf
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explain the guarantee? New closure or replace the wine or what?
Thanks for the detailed reply - truly appreciate it.
Cheers
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Given Lafonâs typical lack of reductive winemaking, this has made for some embarrassing 2013 blind calls over the yearsâŚ
All the Diam closures are guaranteed to be consistent from one to the next, and all are guaranteed against TCA. The premox/years guarantee is not explicit on their public facing material, but thatâs what we are told by reps., etc. Hereâs a sample quote from a Diam news release: â Itâs not enough to say, âmy cork controls oxygen transfer,ââ says Margot. âWe need to guarantee that the oxygen will be controlled over time. If the winemaker needs 30 years of aging, they need to be confident that the oxygen transfer will be stable for 30 years.â
If you can prove that the closures were faulty (big if), I suppose the compensation would be the value of the wine (there again, not sure how value would be determinedâ I would start by asking for retail value). Since @William_Kelley chose Diam 30 for his wines, maybe he has more details. (The 10 and 30 are the same closure other than the guarantee, so it warrants some inquiry.)
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@David_Patte , so if you use a 30 and your wines shows signs of oxidation at 10 years? Just kidding - somewhatâŚ.
And you can prove that it wasnât bad winemaking on your part or a wine that would never be expected to remain fresh past 10 yearsâŚ
the question I have is: for whom is the guarantee? The wine drinker who paid for the wine hopefully . . .
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My guess is that the winery will need to submit the claim - and that this guarantee is not directly forwarded to the âconsumerâ - just as in the case of TCA. A consumer canât get any money back directly from a cork manufacturer . . .
Cheers
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Would not be an easy thing to determine, would it?
Cheers
Hearing that Diams are made with beeswax makes me sorry for the bees. First they have to pollinate every fruit tree in the Central Valley and now they have to give up their wax to a French company
I believe there are actually different options for OTR within the 30 and perhaps the 10. Have also heard rumors that a 50 is in the works.
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As Jean-Marie Guffens likes to say, some winemakers donât like screwcaps because if thereâs a problem with the wine they have to admit it was the winemaking that screwed it.
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Wow. You certainly are starting to post like you are a shill for the cork industry.
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Do you think that there are only American bees? 
Knowing the French, I bet the beeswax comes from outside of France, just like the snails and foie gras they put in cans and the mustard grains used in Dijon. Then again, there arenât that many cork trees in France either.
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Howard,
The people who own Diam also own Seguin-Moreau, one of my big competitors in the barrel world.
I should be mocking them. Instead, we were one of Diamâs first customers.
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Well yes, as others have said, the winery would submit a claim to D and they will ask you to send samples to their lab (CA in our case). I had a claim for a different reason and they requested two bottles. (They concluded it was the bottling companyâs poor equipment that caused the issue (little chunks of cork in the bottle for the Origine that we used in 2021)).
Well that would be niceâ we donât have OTR (or other) options between 10 and 30 in the U.S.