The ability of a product to protect hair from the effects of external factors can be assessed on natural hair strands and/or recruited volunteers.
Natural hair strands and/or volunteers’ hair are exposed to selected, controlled temperature, humidity and wind conditions over different time points. Various parameters can be monitored such as frizz formation, curl shape, curl retention and hair hold.
Obtained results may be associated with representative photographs.
“Strong Hold”, “Anti-Frizz”, “Humidity protection”, “Long-term protection”