A na-eme Hydroxypropyl methyl cellulose (HPMC) site na owu a nụchara anụcha, alkalized na sodium hydroxide (mmiri caustic soda) ngwọta, etherified na methyl chloride na propylene oxide, mgbe ahụ, neutralized, nwetara mgbe nzacha, ihicha, gwepịara na sieving.Nkọwapụta pụtara...
GỤKWUO