TLDR Microfluorometry effectively measures how much polymer coats and penetrates hair, useful for evaluating hair products.
The study demonstrated that microfluorometry is an effective method for measuring polymer deposition on hair fibers, with higher polymer concentrations resulting in greater fluorescent intensity. Twenty hair fibers were tested for each polymer concentration (0.1%, 0.01%, and 0.001%) and compared to a control group. The findings indicated not only surface deposition but also some penetration of the polymer into the hair cuticle, and diffusion experiments showed that polymers could reach the hair's core within 1.5 hours. This technique offers a valuable tool for the cosmetic industry to assess product efficacy and hair health.
10 citations,
March 2005 in “International Journal of Cosmetic Science” Oxidation changes human hair by breaking down fats and forming new acidic groups, affecting how it interacts with conditioners and cosmetics.
56 citations,
January 1996 in “Journal of Forensic Sciences” Dye enters hair at the edges of cuticle cells and penetrates more from water than alcohol-based solutions.
4 citations,
November 2017 in “Journal of Cosmetic Dermatology” Certain polymers can stick to hair and increase volume, working best at a pH of 7 to 9.
13 citations,
March 2006 in “International Journal of Cosmetic Science” The study found that a polymer treatment changes the charge on hair surfaces, making bleached hair smoother and less porous.
March 2005 in “International Journal of Cosmetic Science” DVI provides detailed 3D imaging of hair and shows how various products protect and enhance hair.
25 citations,
January 2010 in “International Journal of Pharmaceutics” Particle properties affect drug retention and release in minoxidil foams, with lipid nanoparticles having higher loading capacity.
8 citations,
December 2003 in “Materials Research-ibero-american Journal of Materials” Polyquaternium 7® builds up on hair, improving its look and feel, and AFM is good for measuring these changes.
