Evaluation test for scouring agents: Fatty soil on a hard surface

A method has been developed to rate the scouring ability of abrasive cleaners on a tough fatty film which is baked onto an aluminum panel. Results were obtained on a comparative basis, and are best determined by one person using as few panels as possible for each investigation. The soiled surface was prepared by spreading 5 ml of a lard‐chicken fat mixture on one side of the panel, and baking for 5 min at 575F. Three classes of scouring agents were studied, steel wool with soap, silex which was resin‐bonded to nylon fiber and silex on a dish cloth. Results can be expressed as Scouring Efficiency, and related to an arbitrary standard designated as 100%.