Blonde Girl With A Glass Of Champagne Strips A Pink Negligee On The Antique Chair

Champagne corks
Corking a Champagne Bottle: 1855 engraving of the manual method
Champagne corks are built from several sections and are referred to as aglomerated corks. The mushroom shape that occurs in the transition is a result of the bottom section, which is in contact with the wine, being composed of two stacked discs of pristine cork, cemented to the upper portion which is a conglomerate of ground cork and glue. Prior to insertion, a sparkling wine cork is almost 50% larger than the opening of the bottle. Originally they start as a cylinder and are compressed prior to insertion into the bottle. Over time their compressed shape becomes more permanent and the distinctive "mushroom" shape becomes more apparent.