Usually, when the depilatory cream is unopened, the shelf life is two years. If it is not opened, it can be used at any time within two years. If it is opened, it must be used within 3 months. Once the opening is easily oxidized by air, the oxidized depilatory cream will not have much effect. You can buy a new one if you reuse it. The main components of depilatory cream are mercaptoacetic acid and barium sulfide.

The depilatory cream is exposed to the air after opening the package, which is likely to be oxidized, and the depilatory effect will be affected to some extent. Depilating cream should be stored in a cool and dry place to avoid sun exposure. After the depilatory cream is used up, tighten the lid and seal it. Try not to leave it for too long. After opening the package, it is best to use it up within three months. If it is not used up, it needs to be thrown away and cannot be used again.

How to use depilatory cream correctly?

You should keep your skin clean before applying depilatory cream. Then you can use a hot towel to apply local heat to the part to be depilated, so that the pores can be opened. Then, apply the depilatory cream evenly on the corresponding parts with a scraper. At this time, you should pay attention to keeping the cream close to the hair roots, and the coating thickness should be about 5 mm

After waiting for 5- 10 minutes, gently scrape the area with the attached scraper or paper towel. If the hair leaves the skin easily, you can continue shaving. If you can't remove the hair well, you need to wait a few minutes before shaving. After the scraping test of depilatory cream is completed, wash off the residual depilatory cream on the skin.

The above contents refer to Baidu Encyclopedia-depilatory cream.