The initial cut on your bowl blank will form the inside and outside edges which will then determine the angles for the subsequent rings of the bowl.
The “trick” employed to make flared bowls is that the angle at which the rings are cut allows for sequential layers to be formed from a single glued-up blank. This works well because various species of wood laminated together in the blank will align nicely as each layer is added. You can make bowls of various shapes and sizes with this technique.
