Product Description Cares for hair throughout the lightening process even on straightened hair. Shade Correcting Oil is the liquid phase needed to turn bleach into a paste. The hairs integrity is protected throughout the entire process and the hair feels better to the touch. A combination of two corrective pigments neutralize yellow hues formed by lightening. It is highly recommended with all lightening because it serves to protect the hair during the chemical oxidation process as well as guaranteeing the hair is soft and conditioned after treatment, ready for further color applications.