Hair dryers are often used and cause hair damage such as dryness, dryness and loss of hair color. It is important to understand the best way to dry hair without damaging it.
The study evaluated changes in ultrastructure, morphology, moisture content, and hair color after repeated shampooing and blow drying at various temperatures.
Method
A standardized drying time was used to ensure that each hair was completely dry, and each hair was treated a total of 30 times. The air flow was set on the hair dryer. The flowers were divided into the following five experimental groups: (a) no treatment, (b) drying without a dryer (room temperature, 20℃), (c) drying with a hair dryer for 60 seconds at a distance of 15 cm. (47℃), (d) 30 seconds with hair drying at a distance of 10 cm (61℃), (e) drying with hair 5 cm (95℃) for 15 seconds. Scanning and transmission electron microscopy (TEM) and lipid TEM were performed. Water content was analyzed by a halogen moisture analyzer and hair color was measured by a spectrophotometer.
Result
As the temperature increases, the surface of the hair is more damaged. No cortical damage was ever observed, suggesting that the hair surface may act as a barrier to prevent cortical damage. The cell membrane complex was damaged only in the group that dried their hair naturally without blow drying. Moisture content was lower in all treated groups compared to the untreated control group. However, the content differences between the groups were not statistically significant. Drying under ambient conditions and 95℃ appeared to change hair color, especially lightness, after only 10 treatments.
Conclusion
Although using a blow dryer is more damaging to the surface than natural drying, using a blow dryer at a distance of 15 cm with constant motion is less damaging than natural hair drying.
Post time: Nov-05-2022
