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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.

Significance and Use

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.

Keywords

appearance; appearance difference; color; color difference; color matching; geometry; gonioappearance; goniochromatism; goniospectrophotometry; multiangle spectrophotometry; spectrophotometry; ICS Number Code 17.180.30 (Optical measuring instruments)

To find similar documents by ASTM Volume:

06.01 (Paint -- Tests for Chemical, Physical, and Optical Properties; Appearance)

To find similar documents by classification:

17.180.30 (Optical measuring instruments Including spectroscopes, geodetic instruments, etc. Ophthalmic optics and instruments, see 11.040.70 Laser equipment, see 31.260 Fibre optics, see 33.180 Optical equipment, materials and components, see 37.020 Photographic equipment lenses, see 37.040.10)

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