Schwarzkopf BC pH 4.5 colour freeze silver Micellar Shampoo cleanses and protects lightened or grey hair from yellowing. Its new technology works at a cellular level to restore the inner hair structure and form a sealing matrix on the surface. During cleansing, a blue-violet dye is subtly deposited on the hair to refresh or add a cool tone direction, while its caring ingredients help improve hair condition. Technology not only seals the surface of coloured hair as conventional colour care does but most importantly, it freezes the colour pigments deep inside the hair matrix for optimal colour. Comes in 1000 ml.