A method for processing waste chewing gum to form granules, wherein the granules have a D50 diameter is provided, the method comprising the step of granulating the waste chewing gum in a granulator, the granulator having a screen comprising a plurality of rectangular holes through which the granulated material passes, wherein the holes have a side of length x and where the following relationship applies:D 50 =A x 2 +B x+C [Formula I]in which A, B and C are constants.
