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Table 1 Characteristics of 20 beauty salons used in this study

From: Indoor concentrations of VOCs in beauty salons; association with cosmetic practices and health risk assessment

Salon No. Area (m2) Working hour (h) No. of cosmetologists Hair coloringa Nail treatmenta Hair stylinga Ventilationb
1 120 8 8 5 3 7 F
2 130 9 7 7 3 12 F
3 120 9 5 4 5 10 F
4 130 7 9 2 7 4 F + W
5 160 8 15 7 4 6 F
6 105 9 3 3 2 2 F + W
7 125 10 9 8 4 4 AP
8 110 8 9 5 8 2 F + W
9 95 9 7 7 5 7 F
10 100 7 8 8 6 5 F
11 95 9 8 7 9 6 F
12 95 11 8 9 6 4 F
13 100 8 10 8 8 9 F
14 110 10 12 5 4 8 F
15 105 8 10 5 5 6 F + W
16 105 8 11 8 4 7 F + W
17 130 9 14 7 3 6 AP
18 100 11 10 6 7 9 F
19 115 7 12 4 3 7 F + W
20 95 9 9 6 6 8 F
  1. aEach comprises all the activities related to hair coloring, nail treatment, and hair styling
  2. bF fan, F + W fan plus open window, AP air purifier