HAIR CARE 47
process for ease of application. The product was confirmed to be a uniquely formulated microemulsion. The microemulsion is a unique product that is able to penetrated into the hair fibre and reintroduce hydrophobicity that was stripped from the hair due to the loss of lipids and has the ability to form strong hydrogen bonds and ionic bonds, which are crucial to the integrity, appearance and texture of hair. Granrepair Powerbond was able to
effectively minimise damage during 3-4 consecutive bleaching cycles with no post- treatment of a conditioner. The appearance, texture and mechanical properties was much improved compared to the untreated control. When the tress was submitted for ‘anti-breakage after repeat grooming,’ the results exhibited a 42% reduction in breakage compared to the control and were similar to the virgin black hair tress. The hair treated with the product was dramatically stronger based on the data obtained by tensile strength testing relative to the control tresses. The SEM image of the hair tress treated with Granrepair Powerbond displayed cuticles with better symmetry and no cortex exposure at the hair shaft tips. Protecting and reinforcing the surface of the hair is key to preserving the internal components of the hair. Granrepair Powerbond also has the
ability to penetrate the hair fibre during the treatment because it was proven to be a microemulsion by particle size analysis. Confirmation of the product’s permeability was determined by the Drave’s Wetting Test method. The penetration of the product into hair preserves both the surface and internal structure resulting in healthy hair. Granrepair Powerbond demonstrated superior ability compared to untreated hair tresses to improving hair integrity during multiple bleaching process to give hair enhanced combability, improved texture and appearance.
PC
References: 1. Evans T, Wickett RR. Practical Modern Hair Science; Allured Business Media, 2012.
2. Yu J, Yu DW, Checkla DM, Freedberg IM, Bertolino AP. Human Hair Keratins. J. Invest. Dermatol. 1993; 101: (1 Suppl), 56S–59S.
3. Cruz C, Costa C, Gomes A, Matamá T, Cavaco- Paulo A. Human Hair and the Impact of Cosmetic Procedures: A Review on Cleansing and Shape-Modulating Cosmetics. Cosmetics 2016; 3 (3): 26.
4 Robbins CR. Chemical Composition of Different Hair Types. In Chemical and Physical Behavior of Human Hair; Springer Berlin Heidelberg: Berlin, Heidelberg, 2012; 105–176.
5. Gavazzoni Dias MFR. Hair Cosmetics: An Overview. Int. J. Trichology 2015; 7 (1): 2–15.
6. Zeffren E, Knohl R. Hair Bleaching Compositions and Process. US 3816614A, August 5, 1971.
7. Edman WW, Sullivan AT. Hydrogen Peroxide Hair Bleaching Composition and Method. US 3193464A, May 31, 1961.
8. Romanowski P. Humectants – Cosmetic Formulating Basics – Chemists Corner
https://chemistscorner.com/humectants- cosmetic-formulating-basics/ (accessed Jun 13, 2018).
9. Wella Color Charm. Permanent Liquid Haircolor Education Workbook. 10. Repeated Grooming | TRI Princeton
https://www.triprinceton.org/repeated- grooming (accessed Jun 14, 2018).
11. Evans T. Measuring Hair Strength, Part I: Stress-Strain Curves. Cosmet. Toilet. 2013, 28 (8), 590.
12. Roddick-Lanzilotta Ph.D., A. . (Keraplst M. L. .; Kelly Ph.D., R. J. (Keraplast M. L. .; Worth Ph.D, G. H.; Sapsford Ph.D., P. R. Binding Force: Natural Oxidized Keratin Internalizes Hair Repair. Cosmet. Toilet. 2018, 133 (6), 30–39. 13. Evaluation of Wetting Agents by the Skein Test, A. ASTM D2281 - 10(2016), Standard Test Method for International, West Conshohocken, PA. ASTM International; 2016.
14. Friberg SE. Micelies, Microemulsions, Liquid Crystals, and the Structure of Stratum Corneum Lipids. j. Soc. Cosmet. Chem 41; 155–171.
September 2018
PERSONAL CARE EUROPE
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