In production, capsule cosmetics are prepared by encapsulating the contents in a capsule. Most of their encapsulating materials are high molecular organic substances, natural products such as gelatin, gum arabic, agar, and the like, and polymer compounds such as polypropylene and polyvinyl alcohol. At present, the most widely used material in capsule products is composite gelatin, which is made from animal’s bones. Such products do not pollute the environment, but usually have an odor.
In addition to adding certain moisture, the empty capsule formulation also incorporates a metered amount of polyol as a humectant to impart and maintain the softness of the capsule. In addition, a preservative is added to prevent the production of microorganisms and contaminate the contents during storage. Although there is a moisturizing ingredient in the capsule shell, in order to ensure the softness of the capsule throughout the storage process, the outer packaging must be tight and stored in a dry environment.
Capsules prepared by using water-soluble polymer materials such as composite gelatin have certain requirements on the contents of the encapsulation. If the contents are compatible, it must be a non-aqueous formulation. In summary, the content formulation choice must be consistent with the capsule material. At the same time, how to choose volatile oils and their proportions is the key to preparing a full-oil formulation with good performance.