1.1''This specification covers the optical and aesthetic quality requirements for coatings applied to glass for use in building glazing.

1.2''The coatings covered are applied to the glass using either pyrolytic or vacuum (sputtering) deposition methods and are typically applied to control solar heat gain, energy performance, comfort level, and condensation and enhance the aesthetic of the building.

1.3''This specification addresses blemishes related to the coating only. It does not address glass blemishes, applied ceramic frits to spandrel glass, and organic film opacifiers.

1.4''The Nonuniformity for Coated Glass requirements, given in 6.10, pertain to as installed in the building exterior glazing units of vertical and sloped orientations.

1.5''The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.6''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.