Porcelain spot plate (or reaction plates) is a laboratory equipment made from porcelain. Each plate consists of many cavity-like depressions(wells) in which only small amount of reactants can be added at a time.The number of wells on each plate vary from 6 and 12 wells allowing multiple reactions to be performed at a time. Porcelain spot plates are reusable, stronger, highly resistant to the actions of concentrated chemicals and also autoclavable.