Hello Smart People! I need to understand what is what with a linear calibration and how much dot gain comes in to play and where! We are an offset shop with 4 four color presses. Currently using the same curve for all. I believe that you have to start with a calibrated platesetter and the presses in good running condition. (taking into account the sometimes hungover pressman) How do you keep it within 14 to 16 percent? Or is that even a good place to be? What are the variables? Paper? Tack? Ink? Humidity? Kinds of Ink? Please give me some input . . .