584 JOURNAL OF COSMETIC SCIENCE ! 0 10.0 •M 0 I0.0 • Data t•pe Height Data t•pe AMplitude 2 range 1000.0 nM 2 range 0,5000 U i 0 10.0 pM 0 10.0 p• Data t•pe Height Data t•pe AMplitude 2 range 1000.0 nM 2 range 0.5000 U i 0 10,0 PM 0 10,0 Data •pe Height Data t•pe AMplitude 2 range 1000.0 nM 2 range 0.5000 U b 0 10.0 p• 0 10.0 p# Data t•pe Height Data t•pe AMplitude 2 range 1000,0 nM 2 range 0.5000 U Figure 2. a: Height and amplitude images before (top) and after (bottom) sequential nano-indents on the surface cuticles of the same untreated hair fiber. b: Height and amplitude images before (top) and after (bottom) sequential indents on the surface cuticles of the same conditioner-treated hair fiber.

CONDITIONERS AND HAIR FIBER HARDNESS 585 0.5 1.0 1,5 0.500 pM/div 500.000 0,5 1,0 1.5 X 0.500 pM/div • 500.000 riM/Sir b Figure 3. "Real-time" 3-D height images of nano-indents on the "scale faces" of the same hair fiber (a) before and (b) after conditioner-treatment. (3-D height images: scan size = 2 t•m scan rate = 1.001 Hz number of samples = 256 data scale = 500 nm.)