A device for treating, notably for shaping, in particular straightening, the hair, having at least one active portion comprising at least one light emission source that is able to emit, towards the hair, light radiation having a dominant wavelength peak of between 0.8 m and 5 m. The invention also relates to a method for treating the hair, notably for straightening it, using such a device.

A device for treating, notably for shaping, in particular straightening, the hair, having at least one active portion comprising at least one light emission source that is able to emit, towards the hair, light radiation having a dominant wavelength peak of between 0.8 m and 5 m. The invention also relates to a method for treating the hair, notably for straightening it, using such a device.

Disclosed herein is a hair curling iron. The hair curling iron of the present invention includes an iron body. The iron body has a heating body having a tapered triangular shape with a triangular cross-section, and a handle which is coupled to an end of the heating body. In the current invention, the triangular heating body provides new types of hair curls as a result of the tapered triangular shape.

Disclosed herein is a hair curling iron. The hair curling iron of the present invention includes an iron body. The iron body has a heating body having a tapered triangular shape with a triangular cross-section, and a handle which is coupled to an end of the heating body. In the current invention, the triangular heating body provides new types of hair curls as a result of the tapered triangular shape.