What is the primary function of a colorant in materials?

The primary function of a colorant is to be a chemical substance that imparts color to materials. This definition encompasses a wide range of substances used across various industries to enhance the visual appeal, communicate message, and establish branding. Colorants can be found in paints, inks, plastics, and textiles, among other applications, and they work by imparting specific hues to the medium they are used within.

Understanding the role of colorants is crucial in advertising design, as color plays a significant role in capturing attention, conveying emotions, and influencing consumer behavior. The correct option highlights that colorants specifically give color, which is essential for achieving the desired aesthetic and functional outcomes in design projects.

In contrast, the other options refer to processes or substances that do not align with the primary function of a colorant. For example, a substance that absorbs color would not impart color, hence would not fulfill the role of a colorant. Solid particles used in printing and liquids to dissolve pigments are related to the medium or application but do not define the basic function of a colorant itself.