Redken Shades EQ Gloss Processing Solution is a professional hair color product available in a 33.8 oz size. Designed for salon use, it mixes perfectly with Shades EQ Equalizing Conditioning Color Gloss for beautiful results. The unique formula maintains the correct pH level and stabilizes viscosity, allowing for rich color depth and long-lasting durability without lifting the natural pigment. This processing solution is ideal for multiple users, making it convenient for salons and professionals. For optimal results, it's recommended to follow up with Color Extend Shampoo and Conditioner, which are sold separately. Experience vibrant and stunning hair color every time with Redken Shades EQ Gloss Processing Solution.