How long is the shelf life of lipstick? As a necessary cosmetic to light up delicate makeup, girls usually buy a lot of lipsticks and store them at home in order to match different makeup. I don't know that lipstick has a certain shelf life, so how long is the shelf life of lipstick? Please continue reading!
What is the shelf life of lipstick? 1 Lipstick has an unopened shelf life of three years. In general, we can know its production date through the production batch number, and then calculate the expiration time. In addition to knowing its shelf life, we also need to consider the use time. Generally, the service life of a lipstick is about 1 year, and some are even longer, so it needs to be used up before the shelf life.
How to judge the expiration of lipstick
1, depending on the color situation
First of all, we can see whether lipstick has expired from the coloring situation. The way to judge is that if it has expired, the color is different from before, and the color will not be too uniform.
Step 2 smell lipstick
Secondly, you can know if the lipstick has expired by smelling it, because the expired lipstick smells pungent.
Step 3 look at the shape of lipstick
If the expired lipstick is easy to change in shape, it will soften when touched lightly, while the unexpired lipstick usually hardens.
There are three simple ways to judge whether lipstick has expired, namely, looking at the color, smelling the lipstick and looking at the lipstick shape. For example, in the case of coloring, the color of expired lipstick is not very uniform, but it will not be like this if it is not expired; In terms of lipstick taste, the expired taste will be more pungent, and the unexpired taste will be more fragrant; Finally, in the shape of lipstick, the expired shape is easy to change, but it will not change much if it is not expired.
Can lipstick still be used after it has expired?
Lipstick can't be worn after it expires, because some ingredients in it may deteriorate, and continued use may endanger our health. But expired lipstick actually has other wonderful uses, such as using it to wipe jewelry can make it brighter; It can also be used to repair scratches on leather shoes; Later, you can use expired lipstick as a crayon to draw, but it is not easy to throw away.
How to judge whether lipstick has been used?
We can judge from the texture of the outer packaging and lipstick. If it is a brand-new lipstick, it may be passive, but if it has been used for a while, it is difficult to know whether it has been used, unless the other party leaves a deep mark on the lipstick.
How long is the shelf life of lipstick? Generally, lipstick that is not used before opening can be kept for three years. Once the lipstick is opened, it will come into contact with the outside air and dust, as well as the secretion of lip oil, and the shelf life will be shortened to 1-2 years. So if all your lipsticks are painted with the color test of 1-2, they are considered as open, so you need to pay attention to the storage and service life of lipsticks.
The service life of lipstick will be clearly marked on the outer packaging, that is, an open small round cover or square cover with the words 12M, 18M, 24M, etc. , where m is the abbreviation of month, indicating that the shelf life after opening the lid is 12 months, 18 months or 24 months, etc. , everyone is throwing.
What are the hazards of using expired lipstick?
1, the main components of lipstick are lanolin, wax and dye. Because the composition of lanolin is complex, it is easy to cause allergic reactions, such as chapped lip mucosa and peeling, and sometimes it will feel itchy or slightly painful lips.
2. Lanolin lipstick has strong adsorption, which can adsorb dust, bacteria, viruses and some heavy metal ions in the air on the lip mucosa. When drinking water and eating, people can take lipstick and its harmful substances into their mouths and make them directly enter the body.
3. The coal tar dyes used in all lipsticks are terrible carcinogens, and the content of this substance in lipsticks has greatly exceeded the allowable content in food. After applying red, when talking, drinking tea and eating, it is inevitable that lipstick will be licked off unintentionally and enter the human body.
4. Foreign data show that 18.2% of young female cancer patients are related to lipstick and lipstick. Lipstick contains a lot of heavy metals such as lead and cadmium, and lead is cumulative. Long-term inhalation may lead to chronic lead poisoning, anemia, abdominal pain, acute renal failure and cerebral neuropathy.
5, preservatives, antioxidants BHA, these substances have been proved to be quasi-carcinogens, such as preservatives (parabens) can cause breast tumors.
6. The artificial pigment in lipstick may be transformed into mutagen under ultraviolet irradiation, leading to cancer.
7. Lipstick with sweet taste contains saccharin, which has been proved to cause cancer if eaten in excess.