Talc powder medical things

The use of talc medical or talcum powder for cosmetic products is no longer an open secret. Due to its high stability, talc is a white powdery substance with chemically inert and non-irritating odor. It is also the softest mineral in the world. When talcum powder is applied to the skin, it can effectively absorb water and oil on the surface of the skin, and also helps to relieve itching. Based on these characteristics of talcum powder, the pharmaceutical industry began to add talc powder to products such as cosmetics and talcum powder. In recent years, because of the outbreak of the use of talcum powder containing talcum powder, the Johnson & Johnson company has once again paid attention to the safety risks of talc powder medical or talc-containing cosmetics.

Studies have shown that talc is one of the minerals that is buried underground with serpentine containing asbestos, and therefore often contains asbestos in its natural form. Chen Xiaoming, a professor at the School of Chemistry and Chemical Engineering at Sun Yat-Sen University, believes that natural talcum powder does contain asbestos, a component that has been classified as a primary carcinogen, but the qualified talc powder has a very low asbestos content, so it can be considered as qualified talc for medicine. Or cosmetics are safe.

According to public information, talcum powder is safe for use in cosmetics and personal care products approved by many countries and regions around the world such as the United States, the European Union, Canada, Argentina, Brazil, China, India, Israel, South Africa, Turkey, and Indonesia. For talcum powder for cosmetics, many countries and regions have standardized the use of talcum powder. China's national standard "talc powder" (GB/T15342-2012) stipulates that it is divided into "talc powder for cosmetics" and "paint" according to its application. 9 kinds of talcum powder for paint, talcum powder for papermaking, and talcum powder for plastics. "Talc powder for cosmetics" is mainly used for moisturizing powder, beauty powder, talcum powder, and the like. The national standard requires that talc powder for cosmetics should not be detected as asbestos minerals. Therefore, the use of truly qualified talc is safe.

Building PDLC Film For Glass

PDLC Smart Glass is a new type of glass product with a sandwich structure.

A layer of liquid crystal film is wrapped in the middle of two layers of glass, and then bonded into one layer under high temperature and high pressure. According to different control methods and principles, the Smart Tint Glass can realize the change of glass transparent and opaque state through electronic control, temperature control, light control and other methods.

In decoration, we will see a lot of black technology in decoration and building materials, such as dimming glass.

Using Custom Smart Glass, users can control the transparent and opaque state of the glass by controlling the switch of the power supply. The glass itself not only has all the characteristics of safety glass, but also has the function of protecting privacy by controlling whether the glass is transparent.

Due to the characteristics of the interlayer liquid crystal film, the switchable glass can also be used as a projection screen, replacing ordinary screens, and presenting high-resolution images on the glass.

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