There are various types of colorants used in industrial applications, including pigments, dyes, and color concentrates. The choice depends on factors such as the desired color, application method, substrate material, durability requirements, and regulatory considerations. Pigments are often preferred for their opacity and lightfastness, while dyes offer vibrant colors and are suitable for transparent applications. Color concentrates are highly concentrated forms of pigments or dyes, typically used for coloring plastics, rubber, or other materials.