Binder granulation and compaction of coloured powders

This paper gives results of a study of compacts made from both a free powder mixture and granules made from this same mixture, and produced by two binder granulation techniques: high shear granulation and fluidised bed granulation. The characteristics of the compacts are analysed in terms of colour and aspect derived from their reflectance spectra and related to the flow properties and bulk density of the components forming the compacts.