The most common modifier for etching inks, Burnt Plate Oils are made by slowly heating pure linseed oil for varying periods of time, depending on the desired body. (The longer it's heated, the more the oil thickens.) The Light Oil 00 is useful for reducing the tack of inks; it is quit thin in body. The Mid Oil 3 is a medium-bodied oil and has greater adhesion than the 00. It can be added to inks to increase adhesion, particularly when broken traces are experienced in printing.