Where should protective base cream be applied before hair coloring?

Protective base cream should be applied at the hairline and ears to create a barrier between the hair dye and the skin. This localized application helps to prevent irritation or staining of the skin, which can occur when hair color products come into contact with sensitive areas. By concentrating the cream on these specific spots, the risk of allergic reactions or chemical burns is minimized, ensuring a safer and more comfortable experience for the client.

Applying the base cream to the entire scalp, only at the hair ends, or solely in the center of the hair parting does not effectively protect against potential contact with the dye in the areas most prone to irritation. Hence, applying it strategically at the hairline and ears is the most effective method for protecting the skin while coloring hair.