a sifter can be used for separating a mixture of different sized solids
purification_process is separating_mixture. panning is separating_mixture. separating_mixture is reversible_process. decomposition is separating. separating_mixture is complete_separation. divider is use_to_separate_groups_of_items. separating_mixture is physical_transformation. centrifugation is separating_mixture. sifter is sieve. electrolysis is separating_mixture.