Water content of ER-KANG HPMC capsule shell can be controlled at 4-7%

The water content is about 60% lower than that of gelatin hollow capsules

The characteristics of low water content make HPMC hollow capsules suitable for filling hygroscopic or water sensitive contents to extend the shelf life of products.

Water content of gelatin hollow capsules generally 12.5%-17.5%. 

When the moisture content is continuously reduced to 5%, 100% brittleness will occur. 

Gelatin hollow capsules placed in a high humidity environment will soften, deform or even collapse after absorbing water.