Commodity barcode is a symbol composed of a set of regularly arranged bars, spaces and their corresponding characters, which is used to represent a certain commodity information symbol. Each number of the barcode has a certain meaning. General commodity barcodes generally consist of a prefix part, manufacturer code, commodity code and check code as shown in the figure below:

The prefix code in the commodity barcode is a code used to identify a country or region, and the code is assigned to the International Article Numbering Association. The empowerment of manufacturer codes is in the article coding organizations of various countries or regions. In China, the manufacturer codes are assigned by the National Article Numbering Center. The product code is a code used to identify the product, and the right to assign the code is exercised by the product manufacturer itself. At the end of the product bar code, use a check code to verify the correctness of the 1-12 digit code from the left in the product bar code.
"E" on cosmetic packaging
In some imported cosmetics, "e" often appears on the outer packaging, such as: 20ml e 0.67 FL OZ, 150ml e, where the "e" represents the meaning: cosmetics cannot be filled in exactly the same way, such as items The weight is marked as 100ml on the package, but it may be slightly more or less. Therefore, the sign ℮ will be added to indicate that 100ml is an estimate, not an absolute amount. ℮ represents the first letter of estimate. The e standard stipulates that for products with a total standard weight of less than 50g (ml), the actual error is allowed within 9% (including 9%). For products with a total nominal weight of more than 1kg, the actual error allowed is within 1.5% (including 1.5%).
https://www.cosmeticpenpackaging.com/