A powdered substance that is mixed with a liquid in which it is relatively insoluble and used especially to impart color to coating materials or to inks, plastics, and rubber. Pigment also are used to improve the appearance of a substrate on which they are used or impart color to the medium in which they are used.

Dye, substance used to impart colour to paper, leather, and other materials such that the colouring is not readily altered by washing, heat, light, or other factors to which the material is likely to be exposed. Direct dyes are used on furniture, paper and leather.

Resin is a viscous substance that reacts to certain conditions or another substance. The reaction is polymerization, which is the formation of long molecular chains transforming the substance into a solid with adhesive properties during the transitioning.

Nitrocellulose is a plant-based compound, it makes a perfect lacquer finish that brings out the beauty and richness of wood, thus making it very good as a finish on an acoustic or electric guitar, as well as on other stringed instruments such as violins, mandolins, and dulcimers.

Additive is a substance added to something in small quantities to improve or preserve it. Also known as an agent that combined with other agents and adds to their cumulative effect usually by a known degree. Example, food additive is added to enhance the flavor, improve the appearance and extend the shelf life.

Filler materials are particles added to resin or binders that can improve specific properties, make the product cheaper or a mixture of both. Also, filler materials are used for two reasons: to provide additional material to fill the gap, and to supply alloying substances to avoid cracking as the weld cools.