In the first stage, the ware is warmed from 20oc to 45oc and the relative humidity of the air is maintained at 85%. In the second stage the relative humidity is lowered from 85 to 75%. In the third stage it is reduced to the maximum extent possible and at the same time the temperature of the ware is increased to the required level as cracking need not now be feared.
Humidity drying demands meticulous control and is difficult to carry out successfully if the loading of the articles is not uniform. This problem is taken care in the present day dryers by incorporating advanced auto control systems in the ware dryers.
To be contd……
