ASTM D4449-90(1999)
Historical Standard: ASTM D4449-90(1999) Standard Test Method for Visual Evaluation of Gloss Differences Between Surfaces of Similar Appearance
SUPERSEDED (see Active link, below)
ASTM D4449
1. Scope
1.1 This method covers the visual evaluation of gloss differences of coating surfaces, using special types of lamps for illumination. It identifies six aspects or types of gloss that one may look for when using the lamp to assess gloss differences between surfaces. It describes the conditions for using the lamps to best identify small differences in each of the six types of gloss. Four levels of visual gloss differences are distinguished.
1.2 While this technique is useful for both weathered and unweathered specimens, it has not been applied to metallics.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of whoever uses this standard to consult and 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
D3964 Practice for Selection of Coating Specimens for Appearance Measurements
E284 Terminology of Appearance
Keywords
distinctness of image; gloss; haze; visual gloss; Reflectance and reflectivity--paints/related coatings/materials; Surface analysis--paints/related coatings/materials; Visual examination--paints/related coatings/materials; Absorption; Angle of incidence; Directionality of surface; Gloss; Hunter appearance; Light transmission and reflection; Photometry; Refractive index; Texture;
ICS Code
ICS Number Code 87.040 (Paints and varnishes)
DOI: 10.1520/D4449-90R99
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