One Signal Tells It All
Products that contain UV filters reduce the amount of light able to penetrate into the hair. For this test, hair tresses are irradiated with UV light with and without product treatment and then examined for chemiluminescence.
To achieve heat damage, the hair tresses are treated with a hot flat iron. Following treatment the tresses are measured using induced chemiluminescence (ICL-H). The greater the damage, the stronger the signal is.
References:
- Quadflieg JM, Benard S, Rieger I, Rohr M, Schrader A and Schrader K (2007). Basics Of Induced Chemiluminescence Of Human Hair (ICL-H). Hair-Science Symposium (HairS’07), Bad Staffelstein (Germany).
- Schrader K (2005). Chemiluminescence Measurements on Hair (ICL-H) In: Cosmetology – Theory and Practice (Research, Test Methods, Analysis, Formulas) Volume I. Schrader K, Domsch A (eds.). Verlag für die chemische Industrie, Augsburg (Germany): 192-8.
- Benard S, Rohr M and Schrader A (2002) Biophotonics – A New Field in Efficacy Testing (UV-protection of skin and hair monitored by ICL-S and ICL-H). SÖFW J 128, 40-5.
