1. lipstick production batch number

Six digits: YSL, Lancome, Armani

The third letter is the year, 1-20 12, K-20 13, L-20 14, M-20 15, N-20 16.

The fourth number/letter is the month, 0- 10 month, N- 1 1 month, d-1February.

The 56th number is the date.

As shown in the figure: 62n200=20 16 February 1.

The third place is the year: 20 19 403.

The fourth number 2 is the month: February.

The 5th and 6th places are the date: 1.

Under normal circumstances, the shelf life expires in 3 years.

Three digits: Mac, TF, Estee Lauder.

The third number is the year.

The second number/letter is the month:

Month: A- 10, B- 1 1, C- 12.

As shown in the figure: A60 = 2020 2020.

The third number 0 is the year: 2020.

The second number A is the month: June.

Namely: June 2020.

Under normal circumstances, the shelf life expires in 3 years.

Four digits: Dior, Guerlain, Givenchy.

The number 1 is the year.

The second letter is the month.

A n-65438+ 10 month, B P-2 month, C Q-3 month, D R-4 month, E S-5 month, F T-6 month, G U-7 month, H V-8 month, JW-9 month, k.

As shown in the figure: 6U04 = 2065438+July 4, 2006.

The number 6 of 1 is the year: 20 16.

The second number u is the month: July.

The third and fourth numbers are the date: 4th.

Under normal circumstances, the shelf life expires in 3 years.

2. Look at the shelf life after opening.

Skin care products have two shelf life.

One is the unopened shelf life (usually 3-5 years).

One is the shelf life after opening.

If figures such as 6M and 12M can be seen on the package of skin care products, it means that they should be used within 6 months and 12 months after the first opening. After this period, skin care products actually "expired".