The most prevalent dispersant molecules used are polymeric dispersants. There are two categories of polymeric dispersant: polyacid homopolymer and polyacid copolymer types. The polyacid copolymer category can be further broken into two subcategories: hydrophilic and hydrophobic copolymers. The category of dispersant chosen depends on efficiency, rheology modifier compatibility, ZnO compatibility, and other film performance criteria expected for a particular formulation. Polymeric dispersant molecules tend to be lower in molecular weight, ranging from 1,000 to 20,000 daltons.