Since the reform and opening up, China's cosmetics market sales have grown at an average rate of 23.8% per year. Until 2012, during the year, due to the influence of domestic and international markets, the retail sales of cosmetics above designated size in China increased by 17.0% year-on-year. Compared with 2011, the whole year fell by 1.7 percentage points, which was mainly affected by the overall environmental slowdown. In this context, the market puts higher demands on the quality of various types of cosmetics.
Cosmetics are usually in the form of powder or emulsion products. Its quality and properties are affected by particle size, particle shape, fluidity, emulsion stability and compositional changes. There are increasing legal requirements for ingredients in cosmetics, especially in terms of particle size-related ingredients such as antiperspirants, hair gels, toothpaste, facial care products (lipses, mascaras, eyeshadows, etc.), nail varnishes, nail enamels, In all of these products, particle size is a key indicator of the final properties of the product, such as humectants (shower gel, hand cream) and peeling cream.
Deodorants and hair sprays are typical examples in spray cosmetics. If the particle size of the antiperspirant is too small, it will not block the pores on the skin, and it will not prevent sweating. The retention (softness) of the hair gel is directly dependent on the particle size of the gel produced in the gelatin can. It is very important that the size of the hair gel should not be too small, otherwise the hair gel will be inhaled by the user.
For the most widely used toothpaste, the particle size also determines its final performance. The usual ingredients of toothpaste are abrasive materials and whitening agents, which are generally minerals such as calcium carbonate and titanium dioxide. The particle size distribution of these ingredients will play a decisive role in the color of the toothpaste and the effectiveness of removing plaque.
Common facial products such as lipstick, mascara, and eyeshadow. The color density of the lipstick is affected by the type of pigment and the particle size distribution of the pigment. By varying the particle size distribution, different degrees of gloss or frosting effect can be obtained: a wide particle size distribution can achieve a greater frosting effect. The color or blemish effect is affected by the amount of fine particles in the product, which also affects the adhesion of the product. When formulating eyeshadows, the product needs to be durable, and in some cases, the particle size will have an effect on the creaming effect. In general, good eyeshadows are uniform and have a small particle size. This means it can be more easily mixed with the skin for a longer lasting effect while preventing wrinkles in the eyelids. Filaments (filaments) are present in some mascaras. They increase the strength and length of the eyelashes. Adding additives can keep curl and prevent falling off. Strict particle size control of the substrate can help formulators achieve these goals: the wider the particle size distribution of the additive, the more likely it is to fall off.
In summary, the particle size test has become an indispensable part of the cosmetics research and development process. The detection method is also replaced by the traditional chemical method as the instrument detection method. The most commonly used detection instrument is the laser particle size analyzer. The laser particle size analyzer has the characteristics of simple and rapid, comprehensive test and high precision in particle size test. Since the national seven-five scientific research project, China's particle testing industry has developed rapidly, and many excellent particle testing enterprises have emerged in the research and development process. The medium particle size analysis test link is essential. Due to the variety of products, the test samples have both gelatinous samples and dry powder samples. Therefore, the WINNER2308 dry-wet integrated laser particle size analyzer produced by Jinan Micro-Nano is used to help the R&D and production guidance. The effect is remarkable, which has led to the recognition of the laser particle size analyzer in the cosmetics industry.
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