Journal of Student Research 2023

Impact of Personal Care Products on Tensile Strength and Structure of Hair

37

Stress (N/mm^2)

Stress (N/mm^2)

Hair

Strain 1.5612 1.8136 1.6129 1.6788 1.5590 1.5611 1.5492 1.3037 1.5020 1.6030

Hair

Strain 0.7195 0.6534 0.6949 0.6698 0.5347 0.6995 0.9628 0.5679 0.5116 0.6116 0.6600 0.1300

1 2 3 4 5 6 7 8 9

146.96

1 2 3 4 5 6 7 8 9

150.99 148.83 135.11 146.69 125.34 178.97 149.03 146.95 134.80 207.73 152.45

89.67

171.48 161.21 162.10 151.41 188.59 143.10 167.39 161.11 154.30

10

10

Average ST Dev % Deviation

1.57 0.13

Average ST Dev % Deviation

26.16

24.03

16.96

8.20

15.76

19.27

Table 3b: Peroxide Set 2.

Table 3a: Peroxide Set 1.

Hair

Stress (N/mm^2)

Strain

Average ST Dev

153.373 24.46903 15.95393

1.11851 0.484193 43.2891

% Deviation

Table 3c: Peroxide Data Combined.

Table 3 includes the stress and strain values for the peroxide chemical treatment. Two sets of ten hairs were subjected to this treatment and split into set 1 and set 2. These samples were run with a 3% hydrogen peroxide solution for a total of four days. Table 3 is split into three tables, Table 3a, 3b, and 3c. Table 3a includes the stress and strain values for set 1, Table 3b includes the stress and strain values for set 2, and Table 3c includes the average, standard deviation, and % deviation for set 1 and 2 combined.