This practice is for the use of manufacturers and users of instruments to measure the appearance of gonioapparent materials, those writing standard specifications for such instruments, and others who wish to specify precisely the geometric conditions of multiangle spectrophotometry. A prominent example of industrial usage is the routine application of such measurements by material suppliers and automobile manufacturers to measure the colors of metallic paints and plastics.

1. Scope

1.1 This practice provides a way of specifying the angular and spatial conditions of measurement and angular selectivity of a method of measuring the spectral reflectance factors of opaque gonioapparent materials, for a small number of sets of geometric conditions.

1.2 Measurements to characterize the appearance of retroreflective materials are of such a special nature that they are treated in other ASTM documents and are not included in the scope of this standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

Keywords

appearance; appearance difference; color; color difference; color matching; geometry; gonioappearance; goniochromatism; goniospectrophotometry; multiangle spectrophotometry; spectrophotometry; Angular conditions of measurement; Annular configuration; Appearance of materials; Color difference measurements; Conical influx/efflux distribution; Geometric analysis--paints/related coatings/materials; Goniochromatism; Goniophotometry; Pyramidal influx/efflux distribution; Spatial conditions of measurement; Spectral data; Spectrophotometry; Tolerances; Uniplanar configuration;

ICS Code

ICS Number Code 17.180.30 (Optical measuring instruments)

Citing ASTM Standards

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