Seven different balls were tested. For convenience, I have abbreviated each of their names.
Dunlop Championship Xx “extra slow”. This ball has a single yellow dot, and is the ball most players traditionally used in the US until late1999. This ball, along with the Dunlop white, red, and blue dot, is no longer manufactured, but there is still a supply of balls available from vendors. I refer to this ball as the Yellow Dot.
Dunlop Revelation Pro Xx. This ball has two yellow dots. I refer to this ball as the Pro.
Dunlop Revelation Competition. Dunlop’s advertising refers to this ball as the Revelation Competition XT. However, the letters XT do not appear on the ball, or on its box. This ball has one yellow dot. I refer to this ball as the Comp.
Dunlop Max Progress. This ball has no dot on it. Dunlop advertises this ball as being 6% larger than the Pro. I’ll refer to this ball as the MaxP.
Dunlop Max. This ball has no dot, and is blue instead of black. Dunlop advertises this ball as being 12% larger than the Pro. I’ll refer to this ball as the Max.
Prince Extender Yellow Dot. This ball has a single yellow dot. I refer to this ball as the Prince Yellow Dot.
Prince Extender Blue Dot. This ball has a single blue dot. I refer to this ball as the Prince Blue Dot.
Note on Temperatures. All temperatures listed are in degress Fahrenheit, which I abbreviate as f. For example, the abbreviation 93f, would be read as 93 degrees Fahrenheit.
Note on Inches. Rebound hieght is measured in inches, which I abbreviate using ". For example, the abbreviation 55" would be read as 55 inches.
Surface Temperature. I use the term surface temperature to mean the surface temperature of the squash ball.