Definition : Mixing may be define as a process or an operation in which two or component in a separate roughly mixed condition are treated so that each particle lies as nearly as possible in contact with particle of each of the other ingredient alternatively. As it is the process of randomization of the dissimilar particles perfect mixing is produce where each particle of another component.
Mixing is most widely used unite of operation in pharmaceutical manufacturing. In fact it is difficult to find a product where is not involved at one stage of the other during it’s manufacturing.
