62 SILICONES
containing 1% Polyquaternium-7 (Figure 3). The silky, shine, softness, hair gloss, healthy
looking, ease of combing were not much different. The application of Nano Olive Oil in shampoo production can partially replace Polyquaternium-7 but make a big difference in the feeling of strong hair.
Test 4: Comb force test To evaluate the difference in brushing force between the shampoo containing 1% Polyquaternium-7 and the shampoo containing a mix of 3% Nano Olive Oil and 0.5% Polyquaternium-7, the combing force was measured before and after treatment; for wet hair and dry hair.
Results
The shampoo containing a mix of 0.5% Polyquaternium-7 + 3% Nano Olive Oil reduced wet comb force by 25% and dry comb force by 35% compared to shampoo containing 1% Polyquaternium-7 (Figure 4).
Test 5: Hair shine test Naturally straight, black hair tresses were treated with shampoo containing 1% Polyquaternium-7 or shampoo containing a mix of 3% Nano Olive Oil and 0.5% Polyquaternium-7. Hair gloss measurements were taken before and after shampoo treatment, with and without heat.
Results Shampoo containing a mix of 3% Nano Olive Oil and 0.5% Polyquaternium-7 resulted in statistically significant (p <0.05) increases in hair shine compared to shampoo containing 1% Polyquaternium-7 with and without heat (Figure 5).
Test 6: Curl retention test Curl hair tresses were treated with shampoo containing 1% Polyquaternium-7 or shampoo containing a mix of 3% Nano Olive Oil and 0.5% Polyquaternium-7. The increase in the area of the tress along the time indicates that the curls lost their initial shape.
Results Shampoo containing a mix of 3% Nano Olive Oil and 0.5% Polyquaternium-7 showed a significant efficacy in holding of curls (small-area variation) up to 24 hours compared to shampoo containing 1% Polyquaternium-7 (Figure 6).
Shampoo containing 1% polyquaternium ■ Shampoo containing 0.5% polyquaternium
+ 3% Nano olive oil ■
100 80 60 40 20 0
-20 -40 -60
Wet Comb Force
DryComb Force
Figure 4: Reduction in comb force PERSONAL CARE November 2022 Ease of Combing*
TEST 2: Samples
A B C
40 30 20 10 0
Contents
C + 3% Nano Olive Oil C + 3% dimethicone Shampoo contents
26.504 25.973 24.079
A ■ B■ C■ 31.976
29.589 31.536 Before use After use
40 30 20 10 0
Remarks Test group
Positive control group Negative control group
A ■ B■ C■ 35.469
21.435 14.392
Rate of change (%) = (after-before)/before*100 Figure 2: Hair friction and rate of change between sample A, sample B and sample C Overall Product Performance
100% 80% 60% 40% 20%
Hair Strength** Smoothness**
Healthy Looking**
Softness** Silky Figure 3: Sensorial analysis
Test 7: Surface characterization test by SEM The study was conducted to show the effectiveness of repairing damaged hair on the surface between two groups: using a shampoo containing Nano Olive Oil and using a regular shampoo after one wash. Hair surface images were taken by SEM (scanning electron microscopy).
0.5% Polyquaternium-7 + 3% Micellium Oils SIL-1501 HA ■ 1% Polyquaternium-7 ■
80 60 40 20 0
-20 With heat Figure 5: Hair shine Figure 6: Curl retention
www.personalcaremagazine.com No Heat
40 30 20 10 0
Results Shampoo containing Nano Olive Oil showed morphological improvement in cuticle integrity (less damage) and smoothness compared to untreated (Figure 7).
Test 8: Split ends protection test This study was conducted to prove the effectiveness of repairing split ends between
0.5% Polyquaternium-7 + 3% Micellium Oils SIL-1501 HA ■ 1% Polyquaternium-7 ■
Shine** 1% Polyquaternium-7 ■ 0.5% Polyquaternium-7 + 3% Nano Olive Oil ■
4
12 Time (hours)
24
Percent reduction Comb Force (%)
Percent change in Hair Shine (relative to untreated hair) (%)
BNT
Tress area variation
%
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