January 2010 in “EPub Bayreuth (University of Bayreuth)” Polyquaternium-87 reduces hair friction the most among tested polymers.
May 2023 in “Journal of Scientific Research”
10 citations
,
January 2002 in “Nihon Keshouhin Gijutsushakaishi/Journal of S C C./Nihon Keshouhin Gijutsushakai kaishi” The cuticle significantly contributes to hair stiffness, making up about 60% of the total bending stress.
11 citations
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November 2003 in “PubMed” Treatments with certain oils and resins make hair shinier, while zinc oxide and synthetic sebum make it duller.
117 citations
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August 2005 in “Ultramicroscopy” Human hair's strength and flexibility vary by ethnicity, damage, and treatment.
December 2025 in “Zenodo (CERN European Organization for Nuclear Research)” Thermal protectants help reduce hair damage from heat styling.
December 2025 in “Zenodo (CERN European Organization for Nuclear Research)” Thermal protectants help reduce hair damage from heat styling.
1 citations
,
January 2015 in “Journal of Society of Cosmetic Chemists of Japan” Keratin film can effectively measure hair texture and adsorption properties.
13 citations
,
May 2016 in “International journal of biological macromolecules” Keratin's mechanical properties are influenced by hydrogen bonds and secondary structure, and can be improved with the SPD-2 peptide.
December 2023 in “Journal of molecular structure” Hair treatments and dehydration affect hair's lipid and protein behavior, influencing its flexibility and appearance.
3 citations
,
January 2022 in “Biomaterials Science” The dressing can track joint movement and speed up healing of joint wounds.
17 citations
,
July 2018 in “International Journal of Cosmetic Science” Keratin-based particles safely improve hair strength, smoothness, and heat protection.
Hydrophobic modifications make human hair less affected by water.
Different treatments change the strength and flexibility of human hair.
January 2007 in “Proceedings of the Korean Fiber Society Conference” New resin B makes artificial hair fibers hold curls longer than traditional resin A.
Moisture makes hair flexible for reshaping during blowouts.
December 2000 in “日本組織細胞化学会総会プログラムおよび抄録集” 9 citations
,
March 2005 in “International Journal of Cosmetic Science” The torsional method effectively evaluates hair damage and the performance of hair care ingredients.
10 citations
,
November 1984 in “Journal of Colloid and Interface Science” The study found that the Marangoni effect causes the uneven wetting of surfactant-coated hair due to the surfactant moving into the water.
1 citations
,
January 2017 in “Elsevier eBooks” Functional materials in hair care improve shine, volume, frizz control, color protection, and repair.
2 citations
,
December 2010 in “PubMed” The new stiffness test works well for gels but not for sprays.
9 citations
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July 2018 in “Journal of Testing and Evaluation” Adding human hair to sand improves its strength when dry and maintains strength when wet.
49 citations
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June 2004 in “Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences” Human hair becomes weaker and stretches more easily at higher temperatures.
February 2019 in “PubMed” The research found that twisting hair fibers can show changes in stiffness and damage, and help tell apart different hair treatments.
June 2026 in “arXiv (Cornell University)” Hair beds in fluid show nonlinear response due to viscosity, inertia, and elasticity.
12 citations
,
October 1947 in “Journal of the Society of Dyers and Colourists” Mercuric acetate makes wool unshrinkable by changing its elastic properties.
8 citations
,
August 1993 in “Colloid & Polymer Science” The observed "toughening" in keratin was actually due to water evaporation, not a real change in keratin.
January 2010 in “DR-NTU (Nanyang Technological University)” Hair coloring and chlorine change hair strength differently.
69 citations
,
January 2009 in “Advances in Materials Science and Engineering” Wool keratin is reactive, biocompatible, biodegradable, and can model keratin from other sources.
19 citations
,
January 2009 in “International review of cell and molecular biology” Hair's strength and flexibility come from its protein structure and molecular interactions.