Powder cosmetics are beauty cosmetics used on the face. Very fine-grained powder is applied to the face to cover certain defects on the skin, requiring an almost natural skin tone and good texture. Powder products should have good slipperiness, adhesion, absorbency and covering power, and their aroma should be fragrant and mellow but not strong, so as not to cover up the fragrance of the perfume.
1. The production process of fragrance powder (including talcum powder and prickly heat powder) is mainly There are mixing, grinding, sifting, flavoring, fattening, packaging, etc.:
1. Preparation work
Before making ingredients, check whether the raw materials have passed the inspection by the inspection department and calibrate the scale.
The machine must be inspected before manufacturing. Whether the ball mill, high-speed mixer, ultra-fine pulverizer and sieve machine are operating normally. The manufactured containers, ball mill, ultra-fine pulverizer nylon bags, sieves and aluminum barrels should be professionally used when manufacturing fragrance powders of different colors. Special materials. When exchanging fragrance powders of different colors, equipment and containers such as high-speed mixers and ultra-fine grinders should be thoroughly cleaned.
2. Mixing, grinding, and sifting
The main methods of making fragrant powder are mixing, grinding, and sifting. Some are mixed, ground and then sieved, while others are ground, sieved and then mixed.
(1) Mixing
The purpose of mixing is to mechanically mix various raw materials To mix evenly, there are four main types of machinery for mixing fragrant powder, namely horizontal mixer, ball mill, V-shaped mixer and high-speed mixer.
The high-speed mixer is a high-efficiency mixer used in recent years. The entire fragrant powder mixing time is about 5 minutes, and the mixing speed reaches 1000-1500r/min. The high-speed mixer has a jacket device that can be cooled by cooling water.
(2) Grinding
The purpose of grinding is to grind the powder again Grinding makes the added pigments distribute more evenly and show the proper color. Different grinding degrees will cause the color of the fragrant powder to be slightly different. There are three main types of grinders. That is, ball mill, jet mill, ultrafine pulverizer.
(3) Screening
Powder mixed and ground through a ball mill To pass through the horizontal sifting machine, its shape is the same as that of the horizontal mixer. The rotating shaft is equipped with a brush, and there is a sieve at the bottom of the sifting machine. The brush will drop the powder through the sieve into the sealed wooden box at the bottom to separate the coarse particles. If using The powder obtained from the jet mill or ultrafine pulverizer and then passed through the cyclone separator does not necessarily need to be screened.
(4) Flavoring
Generally, the essence is added to part of the carbonic acid in advance. Calcium or magnesium carbonate, stir evenly and then add it to a V-shaped ball mill for mixing. If an airflow mill or ultra-fine pulverizer is used, in order to avoid the adhesion of grease substances, improve the grinding efficiency, and avoid the impact of the heating of the powder on the essence, Calcium carbonate and essence should be mixed and added to the powder that has been finely ground and passed through the cyclone separator, and then mixed.
3. Fatty fragrant powder
Generally, the pH value of fragrant powder is 8-9, and the powder is relatively dry. In order to overcome this shortcoming, add Fatty substances, this kind of powder is called fattening powder.
The operation method is to mix and grind the powder into an emulsion. The emulsion contains stearic acid, beeswax, lanolin, white oil, emulsified The proportions of agent and water, powder and emulsion vary according to different formulas. Stir thoroughly and evenly. Add 100 parts of powder to 80 parts of ethanol and stir evenly. Filter to remove the ethanol and heat at 60-80°C. Drying in an oven makes the surface of the powder particles evenly coated with fat. The dried powder contains 6%-15% fat and is sieved through a sieve to become fragrant powder products. If there is too much fat, the powder will agglomerate and agglomerate. Fatty powder will not affect the pH value of the skin, and the powder adheres well to the skin, is easy to apply, and has a soft powder texture.
4. Powder sterilization device
It is required that the number of bacteria in fragrant powder and powder cake is <100/8, so the powder must be sterilized. At present, ethylene oxide gas sterilization method is usually used.
Add the powder into the sterilizer, seal it and evacuate it. The ethylene oxide is heated to 50°C in the jacket heater to vaporize, and then Pour 50°C water into the sterilizer to keep it warm for 2-7 hours, sterilize, use a vacuum pump to extract the ethylene oxide gas in the sterilizer, discharge it into the pool, and then pass the filtered water into the sterilizer. Sterile air is used to store the powder in a sterile container and then sent to packaging. The boiling point of ethylene oxide is 11°C. It is a gas at room temperature. It is stored in special steel cylinders. It should be kept properly because it is flammable, explosive and toxic.
5. Packaging
The quality of the fragrance powder packaging box is also an important part. Although the fragrance powder is normal in other aspects, it may also be caused by improper selection of the packaging box. Attention to quality creates problems. In addition to the beauty of the packaging box, the most important thing is that the box should not have odor, and it will not produce odor over time under normal conditions, becauseThe paste in some boxes tends to become moldy in hot and humid climates.
The powder loading machine will also be involved in the quality of the fragrant powder. Various different styles of powder loading will affect the capacity of the fragrant powder in the box. Some The machines are of fixed capacity, some are of fixed weight, and some use vacuum to load powder. In order for the product to comply with the net weight indicated on the label, various raw materials need to have specified standards. Each factory must determine the specific conditions of the designated supplier. For example, changes in visible density will cause changes in the weight of the powder. The difficulty is that if the powder quality is too light, it will not be able to hold the calibrated weight. If the powder quality is too poor, although the calibrated weight has been reached, the powder in the box will be very shallow.
2. The importance of calcium stearate to fragrance powder:
Calcium stearate is a white powder, insoluble in water, cold ethanol and ether, soluble in hot benzene, benzene and turpentine and other organic solvents, slightly soluble in hot ethanol and ether. It decomposes slowly when heated to 400°C and is flammable. It decomposes into stearic acid and corresponding calcium salts when exposed to strong acid and is hygroscopic. Used as lubricant, sliding agent, heat stabilizer, release agent, accelerator, etc. in plastics, machinery, rubber, paint and ink and other industries.
It is understood that: Calcium stearate is used in perfume powder in cosmetics. When added to the fragrant powder, it has strong adhesion to the powder, good lubricity, even spreading, and good formability of the fragrant powder.
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