Final answer:
The false statement about on-the-scalp lightener is that it is always in powder form, as these lighteners can also be creams or oils. On-the-scalp lighteners work with low-volume hydrogen peroxide for safe highlighting techniques.
Step-by-step explanation:
The statement about on-the-scalp lightener that is NOT true is C) On-the-scalp lightener is always in powder form. On-the-scalp lighteners can come in various forms, including creams and oils, in addition to powders. They are specifically designed for safe application to the scalp.
On-the-scalp lighteners are used for different highlighting techniques, where they help to lift the hair color to achieve the desired degree of lightness. The use of low-volume hydrogen peroxide is common as an oxidant in these products, which helps in the lightening process without causing significant damage to the scalp or hair.
Overall, on-the-scalp lighteners must be handled carefully and typically involve a chemical process that permanently alters the hair color by removing natural pigments, contrasting with semi-permanent hair colors which cannot lighten hair since they do not remove natural pigments.