About the Product innovative developer formulated specifically to be used with the Redken Shades EQ Semi-Permanent hair dyes. The unique formula works as a regular developer while turning the liquid hair dye into a versatile gel. Therefore, this developer is the best choice for color services that require precision. The easier and more controlled application is perfect for techniques such as lowlights and contouring. It is also important to mention that this developer contains 2% active hydrogen peroxide. Thus, it will not lift the natural color pigments of the hair. Moreover, as the formula maintains an acidic pH, the hair dying process will be gentle on the hair. All in all, the color will blend easily and seamlessly into the hair and fade true to tone. The hair will appear healthy and show a great and luxurious shine. Specifically formulated to maintain an acidic pH and stabilize viscosity Ensures the proper tone, depth and durability when used with Shades EQ Gloss Doesn't lift hair’s natural pigment Ingredients Active 2% hydrogen peroxide Specifically formulated to maintain an acidic ph and stabilize viscosity Please be aware that ingredient lists may change or vary from time to time. Product information such as ingredients may change. Always read the packaging or instructions for use before using the product. How to Use Mix in a 1:1 ratio with Shades EQ Gloss. Shades EQ Gloss may be applied with a bowl and brush or bottle and may be diluted with Crystal Clear to lessen intensity or customize any shade. Process at room temperature for 20 minutes, up to 40 minutes for gray hair. For resistant hair, process for 15 minutes with plastic cap under pre-heated warm dryer. Remove cap and cool for 5 minutes. For resistant gray hair, process 20 minutes with plastic cap under pre-heated warm dryer. Remove cap and process for additional 20 minutes at room temperature. Follow with Color Extend Shampoo and Conditioner.