Coloration processes refer to the methods used to impart color to materials, such as fabrics, plastics, and paper. These processes can involve the application of dyes or pigments, which are substances that provide color. Dyes are typically absorbed by the material, while pigments remain on the surface. Common techniques include dyeing, printing, and coating. Different factors influence coloration, including the type of material, the chosen colorant, and the application method. For instance, natural dyes are derived from plants and animals, while synthetic dyes are chemically produced. The effectiveness and durability of the color can also depend on the pH level and temperature during the process.