1, principle of color-changing lipstick
The main raw materials of lipstick are oil (castor oil), grease (lanolin) and wax (beeswax). Beeswax can improve the hardness of lipstick; Lanolin, as a solvent of pigment, can improve the dispersibility of pigment; Castor oil gives lipstick stickiness and enhances the coloring of lips. A new color-changing lipstick made of shuhong pigment, with pH value of 3, is light brown before rubbing, and turns red when rubbed on lips. I think the reason for this color change is the change of PH value. Eosin acts as an acid-base indicator!
Because it is a chemical reaction, if the lipstick you use is produced by a regular manufacturer, I don't think it will have much impact on your health.
2. What are the hazards of color-changing lipstick?
According to the report of The New York Times, the research found that the lipsticks loved by women all over the world contain a variety of trace toxic metals, among which the aluminum content is the highest.
Celine Hammond, a professor at the Institute of Environmental Health Sciences at the University of California, published a study in Environmental Health Outlook, saying that they analyzed 24 kinds of lip gloss and 8 brands of lipstick, and found that in addition to the well-known aluminum, they also contained eight heavy metals: cadmium, cobalt, aluminum, titanium, manganese, chromium, copper and nickel. Among them, the contents of aluminum, chromium and manganese are the highest among all detected metals. For example, the average concentration of aluminum in lip cosmetics exceeds 5,000 ppm, while the average concentration of lead is 0.359 ppm.
In addition, in order to increase the brightness of lip gloss, manufacturers often add natural mineral mica to lipstick. Mica usually contains metals such as lead, manganese, chromium and aluminum. The darker the lipstick color, the higher the metal content.
3. The difference between lip glaze and lipstick
1, the difference between lip glaze and lipstick: from the appearance.
Most lip glazes are filled and packaged, and they are all long cylindrical. Because the product is liquid, it usually comes with a lip brush. Lipstick is packed in a round tube and is solid.
2. The difference between lip glaze and lipstick: texture.
The basic ingredient of lipstick is vaseline, which is solid and its texture is drier and harder than lip glaze. Lip glaze is a viscous liquid product.
3. The difference between lip glaze and lipstick: from the perspective of moisture.
Most lipsticks don't moisturize, but besides dry velvet lipstick, there are many lipsticks that moisturize, but they still need lip balm to make up. Lip glaze products are moist, and lip lines are not easy to appear.
4. The difference between lip glaze and lipstick: color saturation.
Lipstick has high color saturation and strong hiding power, while moisturizing lipstick has relatively poor color saturation. The color of lip glaze is bright and moist, which is several times higher than the color saturation of lip gloss
5. The difference between lip glaze and lipstick: durability.
Speaking of durability, it must be that the durability of lip glaze will be better, and it must be a lip glaze that can preserve bright lip color for a long time. Lipstick Even velvet lipstick with high color saturation will fade easily when touching the cup.
6. the difference between lip glaze and lipstick: in terms of usage,
Lip glaze must be painted with a lip brush, so it is generally self-contained with a lip brush. Lipstick can be applied directly with lipstick, or you can draw the outline of your lips with a brush dipped in lipstick and then fill it with color.