Thola izinto ezinhlanu ezibalulekile okufanele uzicabangele lapho ukhetha i-hydroxypropyl methylcellulose (HPMC) yezinamathiselo zethayela, okuhlanganisa i-viscosity, ukugcinwa kwamanzi, kanye nokumelana nokushelela, ukuqinisekisa ukubopha nokuqina okuhle.