Usually inert organic or inorganic materials which are added to plastics, resins or gel coats to vary the properties, extend volume, or lower the cost of the article being produced.

Any material used in conjunction with fiber to construct a sheet of paper or board. Usually added to improve opacity, softness, and/or printability.

Additives used to make a resin less costly. They can be inert or they can alter some properties of the plastic. See Reinforcements.

A term normally used to denote something nonchemical added to an oil or grease, i.e., moly, graphite, zinc oxide.

Pieces of hardwood matching a chosen cabinet color. Sizes range from 1" to 6" wide and 30" to 96" long. Common use is to fill the space where a modular cabinet does not fill a specific wall dimension.

Paper materials used to fill spaces not occupied by fibres.

Small items used to fill out columns or space where needed.