White wine is a wine whose colour can be straw-yellow, yellow-green, or yellow-gold coloured. It is produced by the alcoholic fermentation of the non-coloured pulp of grapes which may have a white or black skin. It is treated so as to maintain a yellow transparent colour in the final product. The wide variety of white wines comes from the large number of varieties, methods of winemaking, and also the ratio of residual sugar. White wine has existed for at least 2500 years. It has accompanied economic development and colonized every country whose inhabitants are wine drinkers: Europe, America, Oceania, although less systematically in Africa and Asia due to climate and religious reasons. The white grapes from which white wine is mainly produced are green or yellow of which there are many so that white wine can be produced anywhere that grapes can be grown. Some varieties are well-known such as the Chardonnay, Sauvignon, and Riesling. Others have a discrete existence hidden behind the name of a wine resulting from the assembly of several varieties.