Cov khoom tseem ceeb rau kev npaj hollow capsules yog gelatin. Cov xim ntawm lub plhaub capsule yog xim zaub mov, suav nrog carmine, amaranth, txiv qaub daj, txiv ntseej ntsuab, thiab lwm yam, nrog rau cov tshuaj lom tsawg heev. Thaum gelatin ua rau hauv cov kua nplaum, me me ntawm cov khoom ntxiv xws li cov xim zaub mov, plasticizer, preservative, thiab penetrating agent tuaj yeem ntxiv. Cov txheej txheem kev npaj ntawm hollow capsules tuaj yeem muab faib ua 6 txheej txheem: sol, dipping, ziab, plhaub extraction, txiav thiab xov, uas tam sim no tag nrho ua tiav los ntawm cov kab ntau lawm.
