than any other vinegar. In the Philippines, it often is labeled as sukang maasim (Tagalog for "sour vinegar"). Cane vinegars from Ilocos are made in two different ways. One way is to simply place sugar cane juice in large jars; it becomes sour by the direct action of bacteria on the sugar. The other way is through fermentation to produce a traditional wine known as basi. Low-quality basi is then allowed to undergo acetic acid fermentation that converts alcohol into acetic acid. Contaminated basi also becomes vinegar. Cane vinegar is also produced in other countries, like France and the United States. A white variation has become quite popular in Brazil in recent years, where it is the cheapest type of vinegar sold. It is now common for other types of vinegar (made from wine, rice, and apple cider) to be sold mixed with cane vinegar to lower the cost. Sugarcane sirka is made from sugarcane juice in parts of northern India. During summer, people put cane juice in earthenware pots with iron nails. The fermentation takes place due to the action of wild yeast. The cane juice is converted to vinegar having a blackish color (from ferrous oxide and acetate). The sirka is used to preserve pickles and for flavoring curries. Grains vinegar made from ale, also called "alegar", is made by malting barley, causing the starch in the grain to turn to maltose. Then an ale is brewed from the maltose and allowed to turn into vinegar, which is then aged. It is typically light-brown in color. Malt vinegar (along with salt) is a traditional seasoning for fish and chips, and in the United Kingdom and Canada, a popular seasoning for French fries in general. Some fish and chip shops replace it with non-brewed condiment. Salt and vinegar are combined as a common, traditional flavouring for potato crisps; in some varieties this involves the conversion of the vinegar to sodium acetate or sodium diacetate, to avoid dampening the product in manufacture. Chinese black vinegar is an aged product made from rice, wheat, millet, sorghum, or a combination thereof. It has an inky black color and a complex, malty flavor. The recipe is not fixed, so some Chinese black vinegars may contain added sugar, spices, or caramel color. The most popular variety, Zhenjiang vinegar, originates in the city of Zhenjiang in Jiangsu Province, eastern China. Shanxi mature vinegar is another