1, depending on the production batch number: Japanese cosmetics with a shelf life of less than 3 years are marked with the production date or shelf life on the outer packaging. Brands that are not directly marked are replaced by their own batch numbers, and the batch number format of each enterprise is different. The first two digits of the 6-character batch number represent the date, that is, the production date. The third letter H-V represents the year, from 2000 to 20 14 respectively. The fourth letter A-L stands for the month, which stands for 1 to 65438+ February respectively.
2, looking for the manufacturer's manual customer service query: Generally speaking, the product packaging has a production batch number, and most Japanese skin care products will include the production date in the batch number. If you still can't find it, you can get the desired answer through the manufacturer's manual customer service.
Date coding methods of commonly used daily chemical brands
1. Coding method of production batch number: this coding method takes the production batch number as the identification of production date, and usually consists of numbers and letters. For example, "L902" means the production of 1999 on the 902nd day.
2. Production date coding method: This coding method takes the production date as a part of the coding, and usually consists of numbers and letters. For example, "02 1999" means 1999 February 19 production.
3. Production cycle coding method: This coding method takes the production cycle as a part of coding, which usually consists of numbers and letters. For example, "PC99" means the 99th production cycle of 1999.
4. Serial number coding method: This coding method takes the serial number of the product as the identification of the production date, which usually consists of numbers and letters. For example, "123456" means the serial number of the product 123456.