Hair Developer 9% (30 Volume)

Berina Professional's Hair Developer 9% (30 Volume) is a professional-grade developer designed to activate hair color, lift natural pigments, and help achieve vibrant, consistent color results. Key Features Activates hair color Helps lift natural pigments Supports consistent color results Professional-grade formula How to Use Combine the desired amount of hair color with the developer according to the manufacturer's instructions. Apply the mixture to the hair, starting at the roots and working toward the ends. Leave the mixture on the hair for the recommended processing time. Rinse the hair thoroughly with warm water. Patch Test Before using the product, perform a patch test to check for any allergic reaction. ● Apply a small amount to a discreet area of skin, such as the inside of the elbow. ● Leave it on for 24–48 hours. ● Check for any redness, itching, or irritation. ● If there is no reaction, use the product as directed. ● If you experience a reaction, discontinue use immediately and consult a dermatologist.