What are specialized preparations that equalize porosity and deposit color in one application called?

The term for specialized preparations that equalize porosity and deposit color in one application is indeed color fillers. These products are specifically designed to address uneven porosity in the hair, which can occur due to previous chemical treatments or environmental factors. By equalizing porosity, color fillers ensure that the hair absorbs color uniformly, resulting in a more consistent and vibrant color result.

Moreover, the ability of color fillers to deposit color simultaneously while balancing porosity makes them particularly useful in various coloring processes. This is especially important in hair coloring, as uneven porosity can lead to patches of different shades, affecting the overall appearance.

In contrast, other options serve different purposes in the hair coloring process. Color enhancers generally boost or amplify existing hues but do not specifically target porosity. Color correctors are used to neutralize unwanted tones in the hair rather than preparing the hair for an even coloring process. Color developers are agents that activate hair color but do not themselves deposit color or address porosity. Each of these alternatives plays a role, but none fulfill the dual function of equalizing porosity while depositing color in one step, which is the defining characteristic of color fillers.