In a traditional technique, a tray dryer is employed to achieve the greatest drying results. A double-walled cabinet with one or two doors is what it is. High-density fibreglass wool insulation is used to cover the space between two walls in order to prevent heat transfer. Gaskets are included with doors. On the mobile trolleys are trays made of stainless steel. The control panel board, process timer, digital temperature controller, cum indication, and other features are included with the tray dryer. Trays are stacked on top of one another in trolleys inside a tray dryer, which is an enclosed, insulated space. Tray dryers are used in manufacturing processes where heating and drying are crucial steps, such as in the production of chemicals, dyes, pharmaceuticals, food products, and colours.