Rank 6 out of 7Stiftung WarentestHaarglätter 01/2019ReleaseJanuary 2019
Straight hair for a time
Hair consists mainly of keratin, a protein. The shape it takes - frizzy, wavy or straight - is determined by hydrogen bonds and ionic bonds that fix the keratin fibres. This structure can be temporarily changed, for example by heat. In the hair straightener, users clamp individual strands between hot ceramic plates and pull the hair from the roots to the tips...