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GlossaryTensile Strength

maximum stress a material endures before breaking when stretched

Tensile strength, also known as ultimate tensile strength (UTS), is the maximum amount of stress a material can withstand while being stretched or pulled before breaking. In the context of hair, it refers to the force required to break a strand of hair when it is pulled from both ends. This property is crucial for understanding the durability and resilience of hair fibers, which can be affected by factors such as chemical treatments, environmental exposure, and overall hair health.

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Evaluation Method of the Degree of Hair Damage: Measurement of Tensile Strength of Human Hair by the Multi-Point Tension Test Method

research Evaluation method of the degree of hair damage. (I). Measurement of tensile strength of human hair by "the multi-point tension test method".

1 citations , January 1987 in “Journal of Society of Cosmetic Chemists of Japan”

The method accurately measures hair damage and strength, revealing effects of cosmetics and metal correlations.

research Novel Compounds for Hair Repair: Chemical Characterization and In Vitro Analysis of Thiol Cross-Linking Agents

April 2025 in “Pharmaceuticals”

APA is a promising new compound for repairing damaged hair, outperforming Olaplex® in strength and elasticity.

Impact of Acid Straightener's pH Value on Hair Fiber Properties

research Impact of acid straightener's pH value in the hair fiber properties

3 citations , June 2019 in “Journal of cosmetic dermatology”

Lower pH straighteners change hair more but weaken it.

research Fiber-Safe Extraction of Red Mordant Dyes from Hair Fibers

13 citations , January 1995 in “Journal of the American Institute for Conservation”

Researchers developed a less damaging way to extract red dyes from wool using EDTA and DMF, preserving the fiber's strength for further analysis.

research Electrospun Scaffold of Collagen and Polycaprolactone Containing ZnO Quantum Dots for Skin Wound Regeneration

23 citations , November 2021 in “Journal of Bionic Engineering”

The new wound dressing helps skin heal faster and fights infection.

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community LLLT seems like it's at least a solid maintenance tool. Can also provide ok regrowth in AA and MPB. - Pubmed

17 upvotes 8 years ago

Low-Level Laser Therapy (LLLT) is seen as a safe and effective method for maintaining hair and promoting regrowth in androgenetic alopecia (AGA) and male pattern baldness (MPB), with devices like the HairMax LaserComb® and iRestore helmet being popular. Some users and professionals are skeptical about its long-term effectiveness and cost.

community Considering giving a laser comb a shot. Here’s a summary of my research on the subject.

9 upvotes 10 years ago

Considering adding Low Level Laser Therapy (LLLT) to a hair loss prevention regimen; discussing the effectiveness of LLLT, and evaluating double-blind random-controlled trials that have been conducted on laser combs.

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