Distilleries generally use stainless steel liquor barrels to store liquor. There are generally two kinds of base liquor. When the quantity is small, pottery altar, wooden sea, bamboo sea, etc. are used, and stainless steel is used more. It will also be questioned, can liquor be stored in stainless steel containers? Will stainless steel containers affect liquor quality? Today, winemaker Xu Xiaoli will tell you.
The traditional containers for storing (holding) liquor in the process of liquor production include wine jar, wine urn, wine sea, wine (wood) box, wine basket, etc. At present, the storage containers used in wine making industry can be divided into four categories: ceramic containers, blood containers, metal containers and cement tanks.
1. Ceramic containers are mainly made of pottery jars, pots and urns. They are usually made of pottery clay, with a round shape, a large belly and a small mouth. They are glazed externally or internally. It is an ancient container for storing and holding wine, which has a long history and is widely used. In the past, almost all of them used small pottery jars and pots to transport and sell bulk liquor. The advantage of ceramic container is that it can keep the quality of wine, and the air is easy to enter, so as to promote the aging of wine, and the cost is low. The longer the wine is stored in a ceramic container, the more metals it dissolves and the yellower its color. Therefore, the color of wine is related to the storage life. In the same age, the container's material and quality are different, and the coloring degree is also very different. In ceramic containers, no matter in ceramic containers or cement storage tanks inlaid with ceramic tiles, the dissolution of calcium is more, followed by that of magnesium, and then copper and iron. According to the research, these metal ions dissolved in wine play an important role in the aging of wine. Pottery urn is a traditional storage container widely used in China's brewing industry, which is an ideal choice for long-term production practice. Up to now, some famous distilleries still use pottery urn to store the original and finished wine, and pay attention to the quality of pottery urn.
2. Blood container traditional Chinese wine container is made of Jingtiao or bamboo strips into wine sea, wine jar, wine basket, etc., which is pasted with multi-layer mulberry paper and coated with blood materials. In addition, the wine box or cement pool made of wood is pasted with multi-layer mulberry paper and coated with blood material as a wine storage container. The above two are collectively referred to as blood container, which is a traditional Chinese wine container with a long history.
“血料”是用动物血（多用猪血）和石灰制成的一种具有可塑性的蛋白质胶质盐，与酒精形成半渗透的薄膜，这种薄膜的特性是水能渗透而酒精不能渗透，对酒度 30度以上的白酒有良好的防渗作用， 30度以下的白酒因为水的所占比例较大，容易渗透血料纸而引起损耗，贮存过久，还会将血料纸层泡软而致使脱落。所以不宜用血料容器来贮存 30度以下白酒。血料容器的优点是可以就地取材，成本较低，不易损坏。大型的酒篓（酒海）、酒箱每个装酒可达 5吨以上。据说血料容器贮酒会对酒质的保持起良好作用。用酒海装酒，超过三年，虽酒度不变但酒色有变黄的趋向。
"Blood material" is a kind of plastic protein colloid salt made of animal blood (mostly pig blood) and lime, which forms a semi permeable membrane with alcohol. The characteristic of this membrane is that water can penetrate but alcohol can't. It has a good anti-seepage function for liquor with alcohol content of more than 30 degrees, Because of the large proportion of water, the liquor below 30 ℃ is easy to penetrate into the blood paper and cause loss. If it is stored for too long, the paper layer of the blood paper will be soft and fall off. Therefore, it is not suitable to use blood container to store liquor below 30 ℃. The advantages of the blood container are that it can take local materials, low cost and not easy to damage. Large wine baskets (wine sea) and wine boxes can hold more than 5 tons of wine each. It is said that wine storage in blood containers will play a good role in maintaining the quality of wine. It has been more than three years since the sea of wine was used to pack wine. Although the alcohol content is constant, the wine color tends to turn yellow.
3. Wooden containers in liquor brewing generally do not use pure wooden containers. Brandy and whisky can be stored in oak barrels with special effects.
4. With the development of wine industry and the continuous emergence of modern materials, many winemakers have adopted large metal containers to solve the problem of small storage capacity of ceramic and blood containers. ① Stainless steel container. Stainless steel has excellent stability and is not easy to be oxidized and corrosion-resistant. At present, stainless steel containers are widely used in distilleries to store liquor. ② Wine storage tank (cement tank). It is a kind of large-scale wine storage container in modern wine industry, which is constructed in the underground, semi underground or on the ground with reinforced cement structure.
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