国产免费av片无码免费看_无码福利日韩神码福利片_日本成人精品在线免费观看_八戒av无码影视大片_亚洲av美女夜夜_91中文字幕视频_黄色特级毛片在线观看_麻豆自制传媒新剧国产之光_人妻少妇大乳在线放_国产日韩欧美另类重口

The difference between them lies in the thickness and the degree of high temperature resistance. Tin paper is produced by metal tin calendering, and aluminum foil is produced by metal aluminium calendering.

Tin paper is softer than aluminium foil. At the same time, tin paper can not be heated because of its low melting point or begins to embrittle when heated to over 160 C. It can only be used in food packaging, such as barbecue food and baking food.

Aluminum foil, because of its high melting point heated to 660 degrees Celsius before melting, can be applied to ordinary barbecue food, baked food, clean and sanitary while maintaining the original flavor. As a result, aluminum foil replaced tin paper in daily life after the reduction of aluminium price. However, because aluminium affects brain development, the surface of current aluminium foil is coated to avoid the release of aluminium.