The Growth Rate control determines the relative thickness of adjacent inflation layers. As you move away from the face to which the inflation control is applied, each successive layer is approximately one growth rate factor thicker than the previous one. Valid values are from 0.1 to 5.0. The default is 1.2.

The Growth Rate control is applicable only when Inflation Option is Smooth Transition, First Layer Thickness, Total Thickness, or First Aspect Ratio.