[1][2] The substrate is transported on a conveyor belt or calender rolls at a regulated speed through the curtain to ensure an even coat of the die.
The curtain is created by using a slit or die at the base of the holding tank, allowing the liquid to fall upon the substrate.
Many manufactures will also include a catch pan to retrieve and reuse the excess fluid.
Curtain coating is a premetered method, which means that the amount of liquid required is supplying from the tank to the screen, to be deposited on the substrate.
Curtain coating is one of the technologies used in the converting industry to modify the properties of substrates.