The process of making perfume includes pretreatment, blending, aging, freezing, filtration, color mixing, bottling, and inspection of the finished product.
1. Pretreatment: raw materials such as alcohol, flavor and water must be pure and without impurities, so they must be pre-treated before use, so as to ensure that the product looks clear, the smell is mellow and the aroma is round.
① Alcohol must be treated: including purification and aging.
There are two commonly used methods for purification, namely the reflux method with alkali in alcohol and the oxidation of potassium permanganate. The aim is to remove impurities. Sodium hydroxide is added to the alcohol, boiled back for a few hours, and then fractionated one or more times to collect the purest part of its aroma for preparation of perfume. Or can be added to the alcohol potassium permanganate solution, quickly stirred after standing, filter to precipitate, and then add activated carbon. After a few days, it is filtered by silica gel to further absorb impurities. A small amount of spices is placed in the purified alcohol and sealed at 15 ° C for several months, which is the aging process.
② Pretreatment of flavor: Add a small amount of pre-treated alcohol to the flavor and use it after aging for 1 month.
③ Pretreatment of water: distillation or sterilization deion. Sodium citrate or EDTA are commonly used to remove metal ions.
2. Mixing: Put the alcohol, essence and water in stainless steel or enamel, silver and tin containers in a certain proportion, stir and mix for a period of time, so that the impurities in the essence are fully precipitation, so that the clarity of the finished product and the anti-turbidity under cold conditions are improved.
3. Aging: The mixed perfume is aged in a closed container equipped with a safety valve. There are two kinds of aging methods for perfume: physical method and chemical method. Physical methods include mechanical stirring, air bubbling, infrared, ultraviolet light irradiation, ultrasonic treatment, mechanical vibration.
Chemical methods include air, oxygen or ozone bubbling oxidation, silver or silver chloride catalysis, tin or hydrogen reduction. During the aging period, the scent of the perfume gradually changes from rough to mellow. However, if the formulation of flavor is not appropriate, it will also produce an unsatisfactory odor. As for the length of time required for aging, some people think that it needs to be 3 months, while others think that it should be longer or shorter. Can be adjusted according to production conditions and other factors.
4. Cooling: When the perfume encounters a low temperature, it will become translucent or foggy, and then it will no longer be clarified if it is heated again, and it will always be cloudy. Therefore, perfume must be frozen before being filtered.
5. Filtration: After aging and freezing, some insoluble substances precipitate out, and filter out to ensure its transparency and clarity. Filter press is used, and diatomaceous earth and other filter AIDS are added to adsorb the precipitation particles, otherwise the sediment blocks the filter cloth holes. After adding the filter aid, the perfume should be cooled to about 0 ° C and maintained at this temperature while filtering. The temperature of the filter press can be cooled by circulating the cooled perfume several times. When the sediment produced by aging and cooling is filtered out, it can be restored to room temperature and filtered again through a fine cloth, which can ensure that the product remains clear and transparent during storage and use.
Due to the use of filter aid, some spices may be absorbed and the loss of aroma should be estimated in advance and compensated afterwards.
6. Color mixing: Adding color is generally after the filtration process, otherwise the color is easy to be adsorbed by the filter aid, but it must be compared with the standard sample after adding color.
7. Product inspection: Use instruments to compare color, determine specific gravity and refractive index, and use conventional methods to determine alcohol content.
8. Bottle: The bottle should be washed with distilled water. When bottling, some gaps should be left at the bottleneck to prevent the solution in the bottle from being heated and expanded during storage.
Post time: Jan-13-2024