There is much debate in the wine world among cork dorks about… corks! It may seem like a petty thing to discuss when one could talk about the millions of wines available and argue which is the best out there. However, corks are the one thing that keep the wine’s flavor and can keep the flavor for years after bottling.
Cork Experts
The Wine Lover’s Companion is a fantastic wine encyclopedia of sorts. Ron Herbst & Sharon Tyler Herbst have compiled everything a beginner or expert wine enthusiast would want into a cool 700-some-odd pages. Provided is a complete dictionary, historical notes, and notes on regions of wine. They also provide common tasting terms, facts about the world’s largest wine-producing regions, and much more. For this blog entry, I read their information about corks and was provided with a wealth of facts, for which I will be using.
There Are 3 Types of Corks
Natural, synthetic, & screw top.
Cork Basics
Natural corks are made from the bark of a type of oak tree found in Spain and Portugal. Once a tree has matured, which takes 16-25 years, the bark can be stripped every 9 years without harming the tree. The stripped bark is then processed and graded. Cork lengths generally range from 1¼ to 2¼ inches, although longer corks can be specially ordered. Fine wines with good aging potential are typically sealed with longer, higher quality corks; wines made for early consumption are often sealed with shorter, lower quality corks.
Major Cork Companies
Neocork® is a co-extruded synthetic wine cork with a foam core of extremely neutral Low Density Polyethylene and an outer TPE skin. The product is available in lengths of 43mm and 37mm, with a diameter of 22mm. Neocork® is free of TCA or other odor causing aromas and offers wine makers a neutral closure to seal their wines. Works on all standard bottling lines and can improve production speed and efficiency. Neocork® s are easily extracted (and reinserted!) from both chilled and ambient temperature bottles. Its foamed ends allow for red wine stain commonly found on wood bark corks and also ensure ease of corkscrew insertion and removal. It seals instantly and does not leak. Bottles can be inverted immediately after corking.
A SupremeCorq closure is made of superior food-grade thermoplastic elastomeric materials (similar to those used in medical devices and baby products) using the highest quality injection molds. They are neutral and do not support microbial growth (TCA) or impart flavor. Because it is made from an elastomer, a SupremeCorq has “elastic” type properties which allow it to expand, contract and rebound. SupremeCorq closures comply with FDA and EU regulations. Synthetic closures are also made from natural materials. To produce food contact grade quality materials, a variety of basic compounds such as carbon, hydrogen, oxygen and nitrogen are extracted from natural materials such as petroleum, coal and natural gas. These materials are combined together in a variety of sophisticated ways to produce different types of recyclable synthetic materials.
Why All the Fuss?
True corks have many desirable attributes they’re very light, they compress enough to be forced into the neck of a wine bottle (and then swell back to fill the neck tightly) and their honeycomb texture grips the bottle snugly, forming a tight seal. When wine is properly stored on its side the cork stays moist and fully expanded, thereby providing an airtight seal. However, if a wine isn’t suitably stored, a cork can dry out and leak, spoiling the wine. Additionally, faulty corks generate the chemical compound 2,4,6- Trichloroanisole (TCA) which produces a musty, moldy character that ruins a wine, in which case it’s refered to as a “corked” wine. Some professional tasters estimate that 2 to 5 percent of wines are ruined because of defective corks, and many feel the problem is escalating. Many leading authorities are suggesting that it’s time to reconsider the screw-cap, arguing that it preserves the wine just as well and would eliminate many of the cork-attendant problems, not to mention the need for corkscrews. Another answer to natural cork issues is the synthetic “cork,” which has made great progress in the last decade. Because synthetic cork doesn’t need to be kept moist to retain its seal, proponents claim that wine can be stored upright. On the other hand, critics point out that these “plastic corks” haven’t yet demonstrated their viability over the long-term.
What Do You Think?
We want to know! Does a wine with a screw cap or synthetic cork make you think differently about the wine? Do you think about the value or taste of the wine if it has a synthetic versus natural cork? Do you think that the cork really matters or has all of this been blown out of proportion? For further information about screw caps, please see this article from About.com .
























