88 HAIR CARE 0.02 0.015 -40.83% 0.01 0.005 0 Control 5% SHSP * 0.01 ≤ p<0.05 ** p<0.01
Figure 1: Wet combing results T0, before treatment and T1, after treatment with sulfate-free shampoo containing 5% SHSP versus a control
containing systems. Shampoo can be made without silicone using SHSP and still achieve the feel of hydration, smoothness, softness and shine. Studies were conducted to measure ease
of combing on hair washed with a sulfate-free shampoo formulated with 5% SHSP using the widely accepted Fibra One multifunctional hair bundle tester (T/GDCDC 022-2022).5
polymer) system was tested for comparison. Hair tresses were washed with a sulfate-
free shampoo containing SHSP demonstrated a statistically significant reduction in wet-combing force compared to the control (sulfate-free shampoo without polymer). The control group achieved a 19.62% reduction
in combing force from T0 to T1 versus the group inclusive of 5% SHSP, showed a 40.83% reduction in combing force, representing a 108% increase in ease of combing (Figure 1). Hair tresses were washed with a sulfate-
free shampoo containing SHSP and dried in a humidity chamber. They demonstrated a significant reduction in dry-combing force compared to the control (sulfate-free shampoo without polymer). The control group achieved a 18.34% reduction in combing force from T0 to T1 versus the group
0.01 -28.66% 0.005 0 Control 5% SHSP * 0.01 ≤ p<0.05 ** p<0.01
Figure 2: Dry combing results T0, before treatment and T1, after treatment with sulfate-free shampoo containing 5% Sodium Hydroxypropyl Starch Phosphate versus a control
inclusive of 5% Sodium Hydroxypropyl Starch Phosphate showed a 28.66% reduction in combing force, representing a 56% increase in ease of combing (Figure 2).
A control (no
Hair tensile mechanical properties and hair friction test Consumers prioritize hair care solutions that strengthen and protect hair integrity, minimizing damage during styling and grooming routines. SHSP addresses these concerns by enhancing hair resilience and providing smoother combing performance. A research firm conducted tensile mechanical
property tests and hair friction analysis on hair washed with a sulfate-free basic shampoo formulated with 5% SHSP and dried in a humidity chamber for 24 hours. Using the widely accepted Fibra One multifunctional hair strand tester with a single strand tensile performance test fixture and a friction performance test fixture (TGDCDC 012- 2020),6
humidity chamber. They demonstrated notable improvements in tensile mechanical properties compared to the control (sulfate-free shampoo without polymer). The control group achieved a 7.67% increase
in tensile mechanical strength from T0 to T1 versus the group inclusive of 5% SHSP displaying a significant improvement of 17.53% in tensile mechanical strength, representing a 129% enhancement in tensile strength improvement (Figure 3). Hair tresses were washed with a sulfate-free
shampoo containing SHSP and dried in a humidity chamber. They demonstrated great reduction in hair friction compared to the control (sulfate-free shampoo without polymer). The control group achieved a 12.58% reduction
results confirmed reduced surface friction,
ensuring optimal durability and protection leading to stronger hair. Hair tresses were washed with a sulfate- free shampoo containing SHSP and dried in a
T0 (Before Treatment) ■ T1 (After Treatment) ■ 200 +7.67% 150 100 50 0 Control 5% SHSP ** p<0.01
Figure 3: Hair tensile mechanical properties test results T0, before treatment and T1, after treatment with sulfate-free shampoo containing 5% SHSP versus control
PERSONAL CARE MAGAZINE May 2026 * +17.53% ** 0.04
0.035 0.03
0.025 0.02 0.015 0.01
0.005 0
Control 5% SHSP ** p<0.01
Figure 4: Hair friction test results T0, before treatment and T1, after treatment with sulfate-free shampoo containing 5% SHSP versus control
www.personalcaremagazine.com **
in hair friction from T0 to T1 versus the group inclusive of 5% SHSP displaying a greater reduction, with an 18.96% decrease in hair friction which corresponds to an overall 51% reduction in hair friction (Figure 4).
Hair glossiness test Consumers increasingly value hair care products that enhance glossiness, delivering a sleek and
T0 (Before Treatment) ■ T1 (After Treatment) ■ **
-12.58% -18.96% *
T0 (Before Treatment) ■ T1 (After Treatment) ■ **
-19.62% 0.015 T0 (Before Treatment) ■ T1 (After Treatment) ■ 0.02 * -18.34% **
Combing force (J); N=5 Tensile Mechanical (MPa); N=30
Friction (J); N=5
Combing force (J); N=5
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