Patent ID: 8251073

Claim:
A method for the multiple treatment of a head of hair, characterised by including the sequential steps of: a) gathering a first section of hair from the head and passing the first section of hair through a first hollow open-ended shield; b) gathering a second section of hair from the head, laying the second section against the outer surface of the first shield, and treating the second section of hair with a first colouring agent; c) positioning a second hollow open-ended shield around the first shield and the second section of hair, gathering a third section of hair from the head, laying the third section against the outer surface of the second shield, and treating the third section of hair with a second colouring agent, wherein said shields are nested together and said second shield includes means to ensure that, when said shields are nested together, a continuous spacing between the shields is provided, thereby to provide a thermal chimney drawing up heat from the scalp to heat the full length of the treated hair sections, and to reduce evaporation.