ASTM B532-85 pdf free.Standard Specification for Appearance of Electroplated Plastic Surfaces.
This specification limits the amounts and types of visualdefects that can be tolerated on decoratively electroplatedsurfaces of plastic products.The quantity of defects permittedshall be specified by the purchaser.Referenced Documents:ASTM Standards:B 374 Terminology Relating to Electroplating2D883 Terminology Relating to Plastics.Terminology:Definitions—See Terminology B 374 for terms relatingto electroplating.For terms not relating to electroplating, seeTerminology D 883.Classification of Surfaces:The appearance of surfaces will be separately evaluateddepending on the prominence of the surface under conditionsof ordinary use.Surface A—The surface that appears most prominentto the observer, or most likely to be noticed at first glance.4.1.2Surface B—The surface (usually adjacent to SurfaceA) which is somewhat less prominent to the observer. Surface C—The surface not readily seen by theobserver except at an angle, or by special observation.Surface D—The surface not visible to the observerunder conditions of normal use.
Where electroplated plastics are used for decorativepurposesthe appearance after plating is important. Thisstandard provides a means of evaluating the appearance of thesubstrate and the coating.Method of Evaluation: The part under test shall be evaluated in the samerelative position as it will normally be viewed under usualconditions of use. After proper positioning,the part under test shall beevaluated at a distance of not less than 600 mm nor more than900mm from the observer，using diffused daylight-typefluorescent lighting or 1500 to 1600 lm/m2 at the surface of thepart being inspected.
The observer shall have 20/20 vision at a distance of 600to 900 mm, corrected with eyeglasses if necessary.
Table 1 limits the extent to which various defects areacceptable on each of the four surface classifications describedin Section 4. In Table 1 the term“some”’assumes that the defectscited are not outstanding, too numerous, or located too closelytogether. The specific number of defects permitted, and theirspacing,shall be specified by the purchaser. The term“no”indicates that the defect cited is not normally acceptable.Theterm “yes”indicates that the defect cited is normally acceptable.ASTM B532 pdf download.