Discoloration is a strong chemical process, so before doing it, it is important to understand how it works, what products are used, and what care must be taken.
The main products used in a discoloration are: bleaching powder and oxidant. The latter is responsible for opening the cuticles and thus removing the pigmentation from the strands. It is important to consult a professional, because he/she will know exactly how to use each product and the ideal quantity.
After discoloration the hair becomes more fragile, and it becomes extremely important to hydrate and cauterize the hair, following the indications of a professional. Exposure to the sun, chlorine and salt can also be very harmful to bleached hair, and can damage the color.