What is another name for developer in haircoloring?

In haircoloring, developer is commonly referred to as a catalyst. This term is used because the developer contains hydrogen peroxide, which acts as an oxidizing agent to facilitate the color process. When mixed with haircolor, the developer helps to open the hair cuticle, allowing the color to penetrate the hair shaft effectively. This oxidation process is essential for both deposit-only and lightening color applications.

The other terms do not accurately describe the function of developer in the haircoloring process. Binder refers to substances that hold components together but isn't representative of a product used in hair color. Activator, although sometimes used colloquially, is not the standardized term for developer in the context of hair coloring chemistry. Lastly, adhesive implies a sticking quality, which is not relevant to how developer functions in the dyeing process. Understanding the role of catalysts in haircoloring is crucial for both application and results in achieving the desired hair hue.