The multi-layer reflective plastic composite rainbow film is a plastic composite film in which two or more resins with different refractive indices are melt extruded and stacked in intervals of up to 100 layers, each having a thickness of only several hundred nanometers, that is, each The thickness of the layer film corresponds to the light wavelength of the light to be reflected. The 200-layer film has a thickness of 0.02 mm. When visible light passes through the interface of each layer, weak reflection and interference occur. If the thicknesses of the layers of the 100 multi-layered thin film we make are basically the same, the wavelengths of light reflected by each layer will be superimposed on the same wavelength, and if there is a positive interference, the composite thin film will appear. Colorful rainbow effect. The multi-layer composite plastic rainbow film with high technical content and high added value prepared from the raw materials is a popular high-end decoration and decorating material in recent years, and is widely used in packaging, printing and other fields. This production technology has been monopolized by the only three companies in the world, and the country has always relied on imports.
After several years of research and development, the Institute of Light Industry Plastics Processing and Applications has completed the study of multilayer optical structure design, lamination process, equipment design and experimental research. Completed a series of technical problems from the laboratory test to the production line to amplify the industry, successfully solved the design and processing transformation of the key parts mold and production line in the preparation of the rainbow film, completed the formula design of the polymer material of the optical structure layer, and various materials The smooth flow control of the layer and the formation, shaping and production of a series of key technologies for a homogeneous product, and the formation of a rainbow film processing technology with independent intellectual property rights.
Reproduced from: China Plastics Additives Network
Mascaras on the market are roughly divided into five types: precision mascara, waterproof mascara, thick mascara, lengthening mascara, and repair mascara. Faced with so many types, you can choose according to your own situation.
The precision mascara makes the eyelashes distinct, the waterproof mascara keeps you from taking off your makeup in the water, the thick lashes contain thick factors to make your eyes deep, and the fibers in the extended mascara make your eyelashes feathery. Flickering and energetic, repairing mascara can add luster to eyelashes and benefit the healthy growth of eyelashes.
The charming and crystal eyes, coupled with thick and long eyelashes, can make the entire facial makeup look vivid and delicate.
Therefore, the care and modification of eyelashes is very important. Use growth mascara to make the original dark, sparse and short eyelashes look black and long.
When choosing mascara, pay attention to the following aspects:
1. Mascara should be safe, harmless and non-irritating to the eyes. If it falls into the eyes accidentally during use, there should be no irritation.
2. Mascara should have a moderate gloss. After use, it will make the eyelashes dark and shiny, and produce better cosmetic effects.
3. The paste is even and fine, with moderate viscosity, is easier to apply, and adheres evenly, and the eyelashes will not harden or clump after use.
4. The mascara does not stick to the eyelids after drying, and is not afraid of being soaked by sweat, tears, and rain.
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