What is referred to as "double processing" in hair coloring?

Double processing in hair coloring specifically refers to the technique of applying bleach to lighten the hair and then following up with a toner or color to achieve the desired shade. This method is often used when a significant change in color is required, particularly for achieving lighter or more vibrant hair tones. The bleaching step removes the natural pigment from the hair, allowing for a fresh base where a new color can be applied without interference from underlying hues.

The importance of the second step is that it allows the stylist to neutralize any unwanted undertones that may arise from the bleaching process, enabling them to achieve a more polished final result. This approach is commonly utilized when transforming dark hair to lighter shades or when aiming for pastel or vivid colors that need a light base for optimal vibrancy.

In contrast, the other choices do not accurately describe the double-processing technique. Toner application alone does not involve the bleaching step, applying color followed by bleach reverses the intended process of lightening first, and color removers focus on removing existing color rather than manipulating natural pigment for a new hue. This clarification enhances understanding of double processing as a specialized procedure in the realm of hair coloring.