Which grade of HPMC is best?

The grade of HPMC that is best for a particular application depends on the specific requirements of the application. Generally speaking, HPMC grades with higher viscosity, such as HPMC 200000cps, are better for applications that require a thicker consistency, such as coatings and suspensions. Lower viscosity grades, such as HPMC 5cps, are better for applications that require a thinner consistency, such as creams and lotions. Ultimately, the best grade of HPMC for a particular application should be determined based on the specific requirements of the application.