1.1 This practice covers procedures for performing visual inspection of membrane switches. This includes visual inspection of overlays and circuitry.

1.2 This practice defines lighting parameters, distance from eye to specimen, viewing angle, and the viewing time allowed for a specific size specimen.

1.3 This practice is only designed for visual inspection of aesthetic qualities of membrane switches. It is not intended for color matching or gloss measurement.

1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.