Dispersant waa budo kala duwan oo si macquul ah u kala firdhiyey dareeraha, iyada oo loo marayo mabda'a ceyrinta qaarkood ama saamaynta carqaladaynta polymer steric, si dhammaan noocyada adag waa ganaax aad u deggan in dareeraha (ama kala firdhiso) .Dispersant waa nooc ka mid ah wakiilka firfircoon interfacial la guryaha iska soo horjeeda ee oleophilic iyo hydrophilic ee molecule.It waxay si isku mid ah u kala firdhi kartaa qaybaha adag iyo dareeraha ee pigments organic iyo organic kuwaas oo ay adag tahay in lagu milo dareeraha.
firidhsanaanta biyaha ku salaysan ee aadka u hufan iyo deegaanka saaxiibtinimo waa aan guban oo aan daxaloobayn, oo waxay noqon kartaa aan xad lahayn oo biyo ah, milmi kara in ethanol, acetone, benzene iyo dareeraha kale organic.It waxa uu leeyahay saamayn aad u fiican kala firdhiso on kaolin, titanium dioxide, Kaalshiyam carbonate, barium sulfate, budada talcum, zinc oxide, bir oxide jaalaha ah iyo midabyo kale, iyo sidoo kale ku haboon kala firdhiso midabada isku dhafan.