A Theoretical Model of Waterless Planography which Explains Some Observed Phenomena

Observations of Waterless Planography are listed and the physical characteristics of these generalizations are described. The total of all forces that clean the plate is proposed and called the Tractive force. The influence of ink, plate and press properties on Tractive force are characterized. A test method for determining the combined influence is proposed. This method is used to show how some roller and ink properties effect Tractive force. Correlation is graphically demonstrated. Suggestions are made for improvements in ink and roller properties.