What is drying?

Drying means the removal of water (or other solvent) from a sample, but why do we do that and how does it work? In this video, Pharma Drama helps you to Get Drying Sorted! We'll explain why we dry materials, how drying methods work, explain the four stages of convective drying and briefly look at what drying methods are used in the pharmaceutical industry. Specific details of how individual drying methods work are given in the following dedicated videos; Freeze-drying;    • What is freeze drying (or lyophilization)?   Tray-drying;    • What is tray drying?   Fluidised-bed drying;    • What is fluidised-bed drying?   Spray-drying;    • What is spray drying?