Will cosmetics deteriorate at high temperatures?

Now domestic cosmetics are also slowly rising, and the quality of some cosmetics can basically be compared with foreign cosmetics. Currently, the shelf life of cosmetics is basically two years. After two years, the cosmetics will deteriorate and should no longer be used. Two years means that the cosmetics can be stored for two years under normal conditions. If they encounter special environments, the quality of the cosmetics will change accordingly. So will the cosmetics deteriorate under high temperature conditions?

Will cosmetics deteriorate at high temperatures?

Cosmetics will deteriorate under high temperatures. From the moment the bottle cap of the cosmetics is opened, its life span enters a "countdown" state, especially in such hot summer conditions, they will deteriorate faster. They are afraid of bacteria, the sun, overheating, overcooling, moisture, and failure. Therefore, storing them according to their weaknesses can extend their service life and slow down deterioration.

How to tell if cosmetics have gone bad

1. Eyeliner and liquid eyeliner

If there are white heads on the tip of your eyeliner that cannot be trimmed off, you should throw them away. If the eyeliner you apply comes off very easily, it's a sign that the eyeliner is expired. The lifespan of liquid eyeliner does not exceed half a year, while the lifespan of eyeliner pencil is generally around 1 year.

2. Mascara

Generally, it is safer to replace a mascara every 3 to 4 months. If your mascara smells like gasoline, or clumps up, or granules appear on your eyelashes when applied, you should stop using it immediately.

3. Eyeshadow

In fact, the shelf life of powdered eye shadow is generally about two years. Remember to clean your eyeshadow brush regularly, otherwise a lot of bacteria will be brought into the eyeshadow palette. If you are used to applying eye shadow with your hands, be sure to wash your hands before applying makeup.

4. Liquid foundation

It turns out that liquid foundation is a breeding ground for bacteria. Unopened liquid foundation can be stored for many years, but once opened, it must be used up as soon as possible within six months to a year. Expired foundation will emit an unpleasant odor and its color will change, which means that the oil composition inside has changed, which will be very irritating to girls' skin.

5. Concealer

Like liquid foundation, expired concealer will change color and look oily when applied to the skin. This is because the oil in the expired concealer will rise to the surface. The lifespan of concealer is no more than one year.

6. Loose powder and powder

The shelf life of general honey powder and loose powder is about 2 to 3 years. Some loose powders containing plant essences contain a small amount of moisture, so be sure not to place them in humid places such as the bathroom to avoid breeding of bacteria. If your loose or face powder starts to clump, turn gray, or turn green, just throw it away.

Precautions for storing cosmetics:

1. Sun protection: Cosmetics should not be stored in direct sunlight or light. Because light exposure can cause the moisture in cosmetics to evaporate, some ingredients will lose their vitality and cause them to deteriorate. Ultraviolet rays in sunlight can also cause chemical changes in some substances in cosmetics, affecting their effectiveness or even causing adverse reactions.

2. Antifreeze: Cosmetics can be stored in the refrigerator's fresh-keeping refrigerator compartment, not in the freezer compartment. In cold seasons, it is not advisable to leave cosmetics outdoors or carry them outdoors for a long time. Because freezing will cause cosmetics to crack, and after thawing, the oil and water will separate, the texture will become coarser, and it will irritate the skin.

3. Moisture-proof: Some cosmetics contain protein, which are prone to mold when exposed to moisture. Some cosmetics use iron covers, which are prone to rust and corrode the cosmetics when exposed to moisture, causing the cosmetics to deteriorate.

4. Prevent long-term storage: The shelf life of general cosmetics is 1-2 years, and the storage period after opening is shorter. Therefore, it is best to use up cosmetics within their expiration date and not use them intermittently until they expire. No matter how good the cosmetics are, no matter how carefully they are stored, if they are out of date, they will be worthless.

5. Anti-fouling: After using cosmetics, be sure to tighten the bottle cap in time to prevent bacteria from invading and multiplying. It is best to avoid using it directly with your hands. You can use a clean cotton swab or other tools to take it. If you take too much at one time, you can apply it to other parts of the body and do not put it back into the bottle.