ASTM_C_1376_-_15.pdf

Designation:C137615Standard Specification forPyrolytic and Vacuum Deposition Coatings on Flat Glass1This standard is issued under the fixed designation C1376;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the optical and aesthetic qual-ity requirements for coatings applied to glass for use inbuilding glazing.1.2 The coatings covered are applied to the glass usingeither pyrolytic or vacuum(sputtering)deposition methods andare typically applied to control solar heat gain,energyperformance,comfort level,and condensation and enhance theaesthetic of the building.1.3 This specification addresses blemishes related to thecoating only.It does not address glass blemishes,appliedceramic frits,and organic films.1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2.Referenced Documents2.1 Reference to these documents shall be the latest issueunless otherwise specified by the authority applying thisspecification.2.2 ASTM Standards:2C162 Terminology of Glass and Glass ProductsC1036 Specification for Flat GlassC1048 Specification for Heat-Strengthened and Fully Tem-pered Flat GlassD2244 Practice for Calculation of Color Tolerances andColor Differences from Instrumentally Measured ColorCoordinates3.Terminology3.1 DefinitionsRefer to Terminology C162,SpecificationC1036 or Specification C1048 as appropriate:3.1.1 blemishes in flat glassrefer to Specifications C1036or C1048,as appropriate.3.1.2 These definitions do not apply to in-service damage.3.2 Definitions of Terms Specific to This Standard:3.2.1 coated overhead glassglass used in an installation inwhich the lower edge of the glass is more than 6 ft(1.8 m)above(the viewers)floor level or cannot be approached within10 ft(3.0 m);the glass can usually but not always be viewedin both transmission and reflection;the glass is usually slopingin from the vertical plane,however,may also be vertical orsloping out from the vertical plane.3.2.2 coated spandrel glassglass used in an installation inwhich the glass is only viewed in reflection from the buildingsexterior.The glass is usually installed vertically,however,maybe at a slope to the vertical plane.3.2.3 coated vision glassglass used in an installation inwhich the lower edge of the glass is a maximum of 6 ft(1.8 m)above(the viewers)floor level;the glass can be viewed intransmission or reflection;the glass is usually vertical,however,may also be sloping in or out from the vertical plane;and the glass can be approached within 10 ft(3.0 m)or less.(Ifthe distance is greater than 10 ft(3.0 m),see coated overheadglass.)3.2.4 coating ruba surface abrasion of appreciable widththat has partial,or complete,removal of the coating producinga hazy appearance.3.2.5 coating scratchpartial,or complete,removal of thecoating along a thin straight or curved line.3.2.6 corrosionchange in the color or level of reflected ortransmitted light over all or part of the glass surface as a resultof degradation of the coating from external sources.3.2.7 crazinga random conglomeration of fine lines orcracks in the coating.3.2.8 cut sizeflat glass sheets cut to specific dimensions.3.2.9 mark/contaminanta deposit of foreign material onthe glass surface.3.2.10 nonuniformityobvious variation in reflected colorof the coating within a lite of glass or between two lites ofcoated glass in the same building,or both.1This specification is under the jurisdiction of ASTM Committee C14 on Glassand Glass Products and is the direct responsibility of Subcommittee C14.08 on FlatGlass.Current edition approved Nov.1,2015.Published November 2015.Originallyapproved in 1997.Last previous edition approved in 2010 as C1376 10.DOI:10.1520/C1376-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.10.1 bandingwide or narrow areas of nonuniformitywith demarcation that appears as a linear line and may occuranywhere on a lite.3.2.10.2 edge to edgegradient nonuniformity within a liteof glass.3.2.10.3 lite to litenonuniformity between individual lites.3.2.10.4 mottlingsplotchy or patchy nonuniformity(not tobe confused with strain pattern inherent to heat-treated glass orin-service staining,or both,or damage of glass).3.2.10.5 picture framingperimeter nonuniformity.3.2.11 pinholesmall area in which the coating is entirelyor partially absent.3.2.12 pyrolyticterm