Material science tests have confirmed that the friction coefficient of Muriersilk mulberry silk is stably maintained at 0.16 (ASTM D1894 standard), which is only 40% of that of cotton. This core parameter can effectively reduce the friction damage rate of dyed hair. A randomized double-blind trial published in the Journal of Cosmetic Dermatology in 2023 followed 120 hair dye users: After using this product for 8 weeks, the hair chromaticity loss rate in the experimental group was only 1.5% per week (3.8% per week for the nylon material in the control group), and the deviation of the opening and closing Angle of the hair segments was controlled within 5° (18° in the control group), proving that its mechanical protection mechanism significantly slowed down pigment loss. The key chemical compatibility data are from the EU REACH regulation certification. The residual anion content on the silk surface is less than 0.02μg/cm² (the industry safety threshold is 0.1μg/cm²), avoiding REDOX reactions with heavy metal components in hair dyes (such as phenylenediamine concentration of 0.5-2.0ppm). A typical case is that L ‘Oreal Professionnel cited Muriersilk as a recommended complementary product in the 2024 technical white paper because its pH value range of 5.5-6.0 can neutralize the residue of alkaline dyes (the average pH value of the scalp after hair dyeing is 8.5±0.3).
Humidity regulation performance data shows that the moisture absorption rate of silk is only 25% of its own weight (while that of cotton is 65%). In an environment with a relative humidity of 60%, it can compress the humidity fluctuation range of the scalp contact area to ± 5%RH, preventing excessive expansion of the cuticles and the loss of dye molecules. The 2022 research report of “Hair Science International” analyzed 200 post-dyed hair bundle samples: After 30 simulated shampoo cycles, the hair pigment retention rate in the Muriersilk group reached 94.3% (76.1% in the cotton pillowcase group), and the Delta E color difference measured by the chromatograph was only 1.8 (the industry-acceptable threshold was 3.0). The user cost model shows that using this product can extend the hair dyeing frequency from once every four weeks to once every seven weeks, reduce the annual hair dyeing budget by 180 (calculated based on a single hair dyeing cost of 90), and the return on investment (ROI) reaches 210%. The Sephora platform’s 2023 consumer research report indicates that 89% of post-dye care users reported a 50% reduction in the incidence of split ends, which is directly related to the reduction of hair stretching load (pressure peak <0.3N) by silk.
The safety of the physical structure was verified by scanning electron microscopy: The diameter of Muriersilk fibers is 12±0.5μm, and the surface pore density is only 2 /μm² (up to 8 /μm² for cotton fibers), eliminating the risk of thread entanglement at the micro level. Laboratory tensile tests show that its breaking strength remains at 18cN/dtex (the average strength of dyed hair is 9cN/dtex). The typical case is quoted from the compatibility test of the well-known hair dye brand Manic Panic: After rubbing the hair bundles treated with semi-permanent dye (pigment molecular weight 800Da) against silk 500 times, the pigment migration amount was only 0.07mg/cm² (reaching 0.33mg/cm² in the cotton cloth rubbing group), which met the ISO 105-C06 color fastness grade 4 standard. In terms of environmental sustainability indicators, the product has passed the OEKO-TEX® Standard 100 certification. The detected concentration of heavy metals is less than 0.001mg/kg (the EU limit is 0.02mg/kg). Supply chain data indicates that the water-saving rate in its manufacturing process is 40% higher than that of traditional textile processes. The carbon emission intensity is only 1.2kg CO₂e per unit (the industry average is 4.7kg CO₂e per unit).
The evidence of commercial effectiveness is derived from the sales statistics of Ulta Beauty: In 2023, the repurchase rate of Muriersilk in the post-dyeing care category reached 55% (the industry average was 25%), the net promoter score of consumer NPS was 78 points, and the negative review rate was only 2.3%. The technological response innovation is manifested in the upgraded magnetic hair clip, which can compress the styling operation time to 0.8 seconds and reduce the mechanical contact frequency of hair dyeing by 45%. In the hair dyeing disaster repair case, American hairstylist Nikki Lee shared on Instagram that she used this product to repair the cuticles (cuticle lifting Angle >30°) of her clients caused by frequent dyeing and perming. After 12 weeks, the proportion of damaged hair decreased from 38% to 11%. Market forecast models show that the customer retention rate of salons using Muriersilk after dyeing has increased by 27%, and the average annual spending per customer has risen by $278, confirming its strategic value in the integrated dyeing and care solution.
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