Please read the instructions inside the package.

According to the information on the package.

Syoss is a brand that produces fantastic hair care and styling products. Its offer includes a wide selection of professional cosmetics that have been developed and tested in cooperation with hairdressers. Over the years, the brand has created cosmetics of the highest standard, meeting the needs of its consumers. Syoss Hair Care is a wide range of products for all hair types that restore their healthy, beautiful appearance. Syoss styling cosmetics contain the Salon Control system, which gives your hair a great look just like after visiting a hairdressing salon. The brand is also known for its hair dye cosmetics, which have beautiful, vivid colors that stay on your hair for a long time.