L'Oreal Serie Expert Metal Detox Neutralizer Pre-Treatment 500ml\n\nDid you know that our water can contain metals?  These metals can get into our water from pipeline erosion over time. Wash after wash, these metals accumulate inside the hair fiber, because the hair acts like a sponge. The level of metal in hair varies, depending on hair porosity and on the water quality where we live. These metals, copper in particular, can have a visible impact your client's colour results in the salon, meaning you might not be seeing your colour results in true high definition.\nMetal that can accumulate inside the fiber can create both a risk of breakage and can negatively impact colour results during colour, balayage and lightening services. This excess copper inside the hair fibre can interfere with the oxydant. This means the oxydant may not be able to do its job properly.\nEnriched with Glicoamine, this patented technology  helps to neutralize excess copper, meaning it won't interfe.