New Closure Solutions Unveiled at 2025 Unified Wine and Grape Symposium
Napa, 01/23/25 – Diam Bouchage, the leading manufacturer of technical cork closures for still wines, sparkling wines and spirits, is proud to announce the launch of its latest innovations at the 2025 Unified Wine and Grape Symposium. With a 20-year legacy rooted in the revolutionary DIAMANT® process, Diam Bouchage has consistently prioritized research and development, transforming the cork closure market with a focus on oxygen management, natural raw materials, and closure aesthetics.
In 2017, Diam Bouchage introduced the Origine by Diam range, an innovative solution combining a beeswax emulsion and a 100% plant-based polyol binding agent with cork granulates. This range offers a natural closure solution while maintaining the reliability of Diam® closures in terms of organoleptic security, consistency, and controlled permeability. Today, the French cork closure manufacturer announces its bio-based range expansion from Diam Origine 30, 10, 5 to introduce Diam Origine 3. The Diam 3 Origine, an affordable option available now, offers a 3-year mechanical guarantee —or a 6-year guarantee when stored at 58°F – and features a slightly higher oxygen input, making it suitable for both long-aging and faster-moving wines.
Collection by Diam: Crafting a Unique Closure Without Compromising DIAM Performance
Building on its commitment to innovation, Diam Bouchage is excited to present the Diam Collection closure. This unique product features a core of Diam technical cork, elegantly clad with a thin sheet of carefully selected cork, which is then treated with the DIAM cleaning process using Supercritical CO2. The high-precision cladding technique, developed exclusively by Diam, ensures each closure meets the technical and aesthetic expectations of winemakers. The Diam Collection is free of TCA, the compound responsible for cork taint.
Christophe Loisel, R&D Director at Diam Bouchage, states, “The Diam Collection addresses the challenge of assessing the true quality of traditional closures. Our meticulous manufacturing process guarantees consistent mechanical performance and oxygen transfer, empowering winemakers to control the aging of their wines.”
The Diam Collection closure will be available at the end of 2025, initially in a DIAM 30 49 mm size.
G3 Enterprise is the exclusive distributor of Diam for North America, ensuring that these innovative products are accessible to winemakers across the region. Attendees of the 2025 Unified Wine and Grape Symposium are invited to visit the Diam booth 508 and G3 booth 600 to learn more about these groundbreaking products and view samples.
Supercritical CO2 with Differentiated Pressure, the Cleaning Process for Corks
The wine industry is the only segment in the food and beverage industry that accepts that the closure might affect the product. Through a comparative tasting, DIAM and G3 will demonstrate the importance of cleaning corks. Supercritical CO2 with differentiated pressure is currently the only and safest technology to consistently ensure the removal of 150 molecules from the corks. With over 20 billion bottles corked using DIAM over the last 20 years; DIAM has been providing the most neutral corks to the market.
Register for a free trade show floor pass with the promo code: DIA215 and attend the trial at the WIN Expo on December 5 at 11:30am
Diam Bouchage is committed to providing customers with sustainable cork closures made from renewable materials. They understand the importance of preserving the environment and the future of the wine industry and strive to offer eco-friendly solutions to wineries worldwide. That is why we are excited to invite you to immerse yourself in a live cork harvest in the heart of a Spanish cork oak forest through Diam’s 360° Cork Harvest Video. This immersive virtual reality experience takes you right into the heart of a Spanish cork oak forest, where you will gain insight into the history and art of cork harvesting, and how Diam’s innovative cork closures are made sustainably.
Diam aims to offer the most technically advanced products from an environmentally responsible supplier. To learn more about Diam’s cork harvesting, the cork manufacturing process, and their commitment to environmental stewardship, contact Diam’s sole distributor in the United States, G3 Enterprises.
Diam Bouchage, the leading manufacturer of technical cork closures for still wines, sparkling wines, and spirits, introduced new permeability options for their popular Diam 10 and Diam 30 corks at the Unified Wine & Grape Symposium.
“Our closure solution is a winemaking solution,” said Dominique Tourneix, CEO Diam Bouchage, speaking at the Symposium. These new cork options allow winemakers to bottle the same wines, on the same day, with different DIAM corks depending on the objectives of aging and maturity characteristics of the wine.
“Diam is a recipe with different ingredients,” explains Tourneix. “By playing with the recipe, and the proportion of the different ingredients, we can adjust the oxygen transfer through the cork structure. Sometimes you may wish to have a quicker wine evolution, and other times you may want to keep it for 30 years. Until recently, the Diam 10 and 30 range had a very tight closure, but we have developed a new recipe with a much more open permeability level."
Diam already offers multiple oxygen ingress rates (OIR) and oxygen transfer rates (OTR) in their Diam 2, 3, and 5 cork ranges. The new permeability options give winemakers the flexibility to use a cork that guarantees a long lifespan while also aging faster for earlier consumption.
Diam is unique among cork suppliers for their work on recipes in micro-agglomerated cork. They continue to grow in high-end wines globally because of the demonstrated consistency of micro-agglomerated cork that guarantees there will be no variances between one Diam cork and another.
“We are the first in the cork industry to work on permeability,” says Tourneix. “We work with different winemaking institutes and universities to help winemakers understand what permeability level they need for their wine. We are committed to expanding the oenological tools available to winemakers, so they can choose the permeability they want. Permeability is the future, and in the next ten years, everybody will want to do it.”
G3 Enterprises, a leading packaging and logistics company for wine and spirits, is the sole distributor of Diam products in the United States. G3 has increased its capacity and production output at its Modesto and Napa facilities to support Diam’s continued growth. To learn more or request samples of the new permeability corks, contact G3 Enterprises www.g3enterprises.com/diam-corks.
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Provides Winemakers with More Choices for Their Wine Programs
MODESTO, Calif. (January 19, 2023) – Diam Bouchage, the leading manufacturer of technical cork closures for still wines, sparkling wines and spirits, has introduced new permeability options for its popular DIAM 10 and DIAM 30 corks designed to provide winemakers with more choices for their wine programs. The new closures can be viewed at the Unified Wine & Grape Symposium in Sacramento, January 25-26, at the Diam booth, #538.
“Oxygen management is critical for winemaking, so Diam offers a wide range of products with different oxygen ingress rates (OIR) and oxygen transfer rates (OTR) for our Diam 2, 3, 5 and Origine by Diam corks. However, winemakers have been asking for a cork option with higher OTRs and this solution will provide them with a brand-new tool to consistently age wines after bottling,” said Dimitri Tixador, director of permeability at the Diam Bouchage’s R&D division. He added, “The new closures will also promote faster aromatic development of the wine during the initial years of aging, making it suitable for use on a range of different wines.”
With these new corks, winemakers will now be able to bottle the same wines, on the same day, with different DIAM corks depending on the objectives of aging and maturity characteristics of the wine.
DIAM’s focus has always been to provide the winemaker with both more control and consistent bottle aging. These new corks were developed to provide winemakers the choice to now opt for a very low or medium oxygen permeability depending on the specific requirements of a wine. The new DIAM 10 and 30 corks offer an alternative solution for long-maturation wines guaranteeing consistency from one closure to another. In addition, the patented DIAMANT® process ensures every cork is guaranteed to be free of releasable TCA (0.3 ng/l) and 150 molecules.
According to Mihailo Panovich, Vice President of Sales for G3 Enterprises, the distributor of Diam closures in North America, “Demand for our Origine line, DIAM 10 AND DIAM 30 closures among the premium wine category continues to grow, and we have increased capacity and production output at both our Modesto and Napa facilities, to support DIAM’s continued growth. This includes the addition of 2 new coaters and a new facility in Napa with laser printing capabilities. We are also adding sales, customer service and technical support personnel to bolster this growth with best-in-class service for the industry.”
Diam Bouchage is a leader in manufacturing technological corks including Diam for still wines, Mytik for sparkling wines, and Altop for spirits. Each year, the company sells more than 2.7 billion closures around the world. G3 Enterprises, a leading packaging and logistics company for wine and spirits, is the sole distributor of Diam products in the United States.
To learn more or get samples of the new permeability corks, contact us at: https://www.g3enterprises.com/diam-corks or stop by the Diam booth, #538 at the 2023 Unified Wine & Grape Symposium, in Sacramento, on January 25 or 26.
About Diam Bouchage
Diam Bouchage is a French company based in the Pyrénées-Orientales region of France and is the global leader in technological corks for still and sparkling wines as well as spirits. Each year, we produce and sell close to 2.7 billion corks. Our aim is to be the reference cork provider for the very best wines in the world. Consequently, we invent solutions which best fulfil the challenges and issues faced by wine producers, in total respect of their work, consumer expectations, cork and the surrounding nature. To learn more, visit: www.diam-closures.com.
About G3 Enterprises
G3 Enterprises is an industry-leading packaging manufacturer and logistics provider. G3 Enterprises leverages its wide breadth of expertise to help our customers by focusing on innovation, quality, and technical services. Our mission is to provide creative, integrated solutions for beverage and ag industry partners with quality packaging products and supply chain services. For more information about G3 Enterprises, visit: www.g3enterprises.com.
The proper control of O2 levels lies at the heart of modern oenology
When winemakers put the cork in a bottle of wine, their job is done. It’s their last oenological act; after that, it’s up to the cork.
In the past, using a piece of cork was a random act of hope — the cork could be very tight or very loose, and the winemaker could be lucky or unlucky. After 5 or 6 years of aging, the result could be reductive bottles, perfect bottles or oxidized bottles — or all three in the same batch. And, the unfortunate part is when consumers experience this fault, they assume it’s the wine style they do not like.
“The amount of oxygen that penetrates the cork directly affects the aging of the wine,” says François Margot, “so it is essential to consistently control the flow of oxygen.” Margot is the North American Sales Manager for Diam Bouchage, a global leader in technological corking solutions for still and sparkling wines and spirits.
“When you use a piece of cork bark, this elasticity will vary from cork to cork and decrease over time,” he explains. “A high elasticity cork will take many years before the elasticity breaks down. When it does, the pressure against the glass decreases as time goes on, and then oxygen goes around the cork instead of through it, oxidizing your wine.”
Revolutionary Diam Technology Eliminates Cork Taint and Controls Oxygen and Time During Winemaking Process and Bottle Aging
Twenty years ago, TCA contamination almost spelled the end of cork closures, and winemakers lost confidence in this natural and sustainable material.
Diam Bouchage pioneered a technology to eliminate cork taint — and ended up giving winemakers a revolutionary new oenological tool to control the flow of oxygen during wine maturation. Instead of random elasticity, the company engineered the cork by granulating it, removing the woody parts, and disinfecting it to remove more than 150 molecules, thus purifying the cork of TCA and other contaminants.
The Diam technology also enabled Diam Bouchage to guarantee the cork’s elasticity and how much oxygen would penetrate the cork. As a result, winemakers can now choose the optimal maturity time of 2, 3, 5, 10 or 30 years for their wine and be confident that the engineered Diam cork will do its job without early oxidization or potential reduction. Diam’s sustainable corking solution, Origine® by Diam, is a bio-sourced cork that offers different permeability options to control wine aging with ranges from 5, 10, and 30 years for still wines.
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“It’s not enough to say, ‘my cork controls oxygen transfer,’” says Margot. “We 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.”
The development of the Diam technology changed the market, and Diam Bouchage is now number one globally for technological closures.
Engineered cork continues to evolve
Further evolution of this technologically-advanced cork enables winemakers to select the optimal contribution of oxygen in two phases — releasing the oxygen from inside the cork: OIR (Oxygen Initial Release), followed by oxygen transfer through the cork over time: OTR (Oxygen Transmission Rate).
“We engineered the cork so the winemaker can choose not only how long the cork will do the job but also how much oxygen will pass through the cork each day,” Margot notes. “The winemaker now has an oenological tool that lets them bottle the same wine on the same day with different Diam corks to achieve differentiated goals instead of using a cork and hoping for the best.”
This phased control of oxygen allows winemakers to fine-tune the development of aromas during the wine maturation process.
“Choosing a cork to control oxygen levels in the bottle properly means controlling both the color and aromatic profile of the wine,” adds Diam’s R&D director, Christophe Loisel, “as well as reducing SO2 levels while respecting the quality of wine as it matures.”
Diam Bouchage continues to expand the oenological tools available to winemakers giving them the power to choose what best suits their wines.
G3 Enterprises is the exclusive distributor for Diam in North America, to learn more about Diam contact G3, www.g3enterprises.com/contact.
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