184 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS ADULTS 270 ø 50 ø 65 ø ARM AXIS Figure 5. Rose of directions for adults. Coordinate is the number of subjects having the principal or secondary axis at each 15 ø step. depth was 100/am for some subjects in the aged group. Figure 8 shows in detail the increase in depth of furrows with age. Furrow depth increases at forty for the principal axis and after that the variations are more individual and become very important. Some people keep shallow furrows throughout their lives.
SKIN RELIEF AND AGING 185 AGED PEOPLE o 270 ø 30 ø AR•t•iAXIS Figure 6. Rose of directions for aged people. Coordinate is the number of subjects having the principal or secondary axis at each 15 ø step. b) It seems that the secondary axis when it does exist becomes deeper with age, but only slightly as compared to the principal axis (Figure 9). 4. THE COEFFICIENT OF DEVELOPED SKIN SURFACE (C.D.S.S.) The C.D.S.S. increases with age: 1.16 _+ 0.01 for children (p 0.001), 1.18 + 0.01 for adults (p 0.01), and 1.20 _+ 0.01 for the aged subjects (p 0.001). The real skin
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