Sherry is a fortified wine made from white grapes that are grown near the town of Jerez, Spain. In Spanish, it is called vino de Jerez. Sherry is regarded by some wine critics as "underappreciated" and a "neglected wine treasure". The word "sherry" is an anglicization of Jerez. In earlier times, sherry was known as sack (from the Spanish saca, meaning "a removal from the solera"). "Sherry" is a protected designation of origin; therefore, all wine labeled as "sherry" must legally come from the Sherry Triangle, which is an area in the province of CÃ¡diz between Jerez de la Frontera, SanlÃºcar de Barrameda, and El Puerto de Santa MarÃa. In 1933 the Jerez DenominaciÃ³n de Origen was the first Spanish denominaciÃ³n to be officially recognized in this way, officially named D.O. Jerez-Xeres-Sherry and sharing the same governing council as D.O. Manzanilla SanlÃºcar de Barrameda. After fermentation is complete, sherry is fortified with brandy. Because the fortification takes place after fermentation, most sherries are initially dry, with any sweetness being added later. In contrast, port wine (for example) is fortified halfway through its fermentation, which stops the process so that not all of the sugar is turned into alcohol. Sherry is produced in a variety of styles, ranging from dry, light versions such as finos to much darker and sometimes sweeter versions known as olorosos. A powder is a dry, bulk solid composed of a large number of very fine particles that may flow freely when shaken or tilted. Powders are a special sub-class of granular materials, although the terms powder and granular are sometimes used to distinguish separate classes of material. In particular, powders refer to those granular materials that have the finer grain sizes, and that therefore have a greater tendency to form clumps when flowing. Granulars refers to the coarser granular materials that do not tend to form clumps except when wet.