Tshawb nrhiav tsib yam tseem ceeb uas yuav tsum xav txog thaum xaiv hydroxypropyl methylcellulose (HPMC) rau cov nplaum rau pobzeb, suav nrog viscosity, kev khaws dej, thiab kev tiv thaiv kev plam, kom ntseeg tau tias muaj kev sib txuas zoo tshaj plaws thiab ruaj khov.