Whiteness: Although whiteness cannot determine whether HPMC is easy to use, and if a whitening agent is added in the production process, it will affect its quality. However, most of the good products have good whiteness.
Fineness: The fineness of HPMC is generally 80 mesh and 100 mesh. Most of the HPMC produced in Hebei is 80 mesh. The finer the fineness, the faster the dissolution, which is generally better.
Transmittance: Put hydroxypropyl methylcellulose (HPMC) in water to form a transparent colloid, and check its transmittance. The permeability of the vertical reactor is generally good, and the horizontal reactor is worse, but it cannot be said that the quality of the vertical reactor is better than that of the horizontal reactor, and there are many factors that determine the product quality.
Specific gravity: moderate specific gravity is better. If the specific gravity is too large or too small, it may be the result of uncontrolled production in the production process.HPMC Hollow Capsules