This is done by heating the rolls of aluminum using a large kiln. Only nitrogen is present in the kiln to avoid oxidation of the aluminum. Application of the lubricant is applied using either a dipping or electrostatic method. In the electrostatic method, the coating is heated and sprayed in a fine mist. The particles are then given a positive charge, while a negative charge is induced in the moving aluminum.
Electrostatic forces cause the particle to adhere to the surface of the aluminum.
The dipping procedure employs the solvent heptane to remove any impurities from the aluminum before it passes through the liquid coating. After the aluminum passes through the coating bath, the remaining heptane is driven off, leaving only the organic coating. Immediately after the coating is applied, the aluminum is slit to the proper width and recoiled onto a core. If the results meet the specifications, the roll is packaged and shipped. Otherwise, the roll must be reloaded onto the slitting machine and coated again.