Final answer:
SoRED is mixed with hair color and developer usually in a 1:1 or 1:2 ratio in a non-metallic bowl and stirred until smoothly blended. A strand test is recommended before full application to ensure desired color results.
Step-by-step explanation:
To mix SoRED, a hair color booster, you need to follow the product instructions closely to ensure the right ratio of booster to hair color. This often involves a mixing ratio such as 1:1 or 1:2 with the chosen hair color and developer. The exact method can vary by brand and product line. Begin by putting on gloves to protect your hands from staining, then combine the SoRED hair color booster with the hair color and developer in a non-metallic bowl.
Stir the mixture until it's well-blended, free of any streaks or lumps. Apply the mixture to the hair according to the application instructions provided, often starting from the roots and working to the tips. Additionally, many professionals recommend conducting a strand test before full application to predict the final color result.