Apparent - What does apparent mean?
In materials, some specifications may be given as “apparent” values, such as the apparent density or apparent whiteness of a material. These values are usually calculated using other measurements (that can be taken accurately or more accurately than is possible for the “apparent” values) to provide an approximate measurement. For example, it is impossible to give the precise density of a sheet of paper as the density will fluctuate across the sheet so the “apparent density” of the sheet is calculated by dividing the basis weight of the sheet by its caliper. Similarly, the whiteness of a material is an optical property and will be influenced by many factors, including the fact that perception is subjective and the perception of light of all colours will vary from person to person.Go Back to Glossary