The empty pharmaceutical capsules is made of film-forming accouterments and corresponding supplementary accoutrements, and its factors generally include one or further film-forming accouterments (substrates), moisturizing agents, surfactants, colorings, sunscreens,etc., if necessary. ancillary accoutrements. Among them, the film-forming material is substantially gelatin, and there are also hypromellose, hydroxypropyl bounce and so on.

    According to the use, the concave capsules can be classified according to the release of their contents in specific corridor of the mortal body, which can be divided into stomach- carpeted concave capsules and enteric-coated concave capsules. Enteric-coated concave capsules can include colon enteric-coated concave capsules.

    According to the translucency, concave capsules are divided into three types transparent capsules (the cap body doesn't contain sunscreen), translucent capsules ( only the cap or body section contains sunscreen), and opaque capsules (both the cap body contains sunscreen).

    According to the source of film-forming accouterments, the concave capsules can be classified according to the source of the main film-forming accouterments, which can be divided into concave capsules of beast origin and concave capsules of non-animal origin. Beast- deduced concave capsules relate to the fact that the main film-forming accouterments of the concave capsules appear from creatures. Non-animal-derived concave capsules relate to the fact that the film-forming accouterments used for the product of concave capsules are non-animal-derived and don't contain any beast- deduced substances.