Why do extensions become discoloured?
There are many causes that can lead to discoloured hair. Various environmental influences as well as contact with various substances can lead to discolouration. A common trigger is the UV filter Butyl Methoxydibenzoylmethane (also called 'Avobenzone'), which is contained in many sunscreens and other lotions. This ingredient reacts with chemically treated hair and leads to unwanted colour casts, especially with blonde or light extensions.
Unfortunately, this can happen simply by applying sunscreen and letting your hair rest on your skin. This is why discolouration often only occurs at the tips of the hair. Avobenzone can now also be found in many day creams/body lotions and similar products that are supposed to protect the skin from UV radiation.
Long heat exposure can also lead to discoloured extensions, as strong heat attacks the colour pigments. In the case of such damage, the product will probably not work effitiently. To prevent discolouration caused by heat, please use a maximum of 180°C when styling as well as a high-quality heat protection spray.