Link-D is a four-phase reconstructive treatment:
BOND LINKER N°1 creates new disulfide bonds during the coloring process;
BOND MAGNIFIER N°2 strengthens and consolidates these;
BOND KEEPER N°3 preserves their strength;
BOND SEALER N°4 binds the amino acids present in the formula with those of the hair cuticles, blocking humidity and preventing the color from fading.