1、Designation: C1376 10Standard 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 revis
2、ion. 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 glazi
3、ng.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, energy perfor-mance, comfort level, and condensation and enhance theaesthetic of the building.1.3 This specification addresses ble
4、mishes 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 a
5、re 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
6、 Heat-Treated Flat GlassKind HS,Kind FT Coated and Uncoated 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
7、 blemishes in flat glassrefer to Specifications C1036or C1048, as appropriate.NOTE 1These 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、.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.NOTE 2The f
9、ollowing terms are designed to guide the user to theappropriate inspection charts and requirements.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
10、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, how-ever, may also be sloping in or out f
11、rom the vertical plane; andthe glass can be approached within 10 ft (3.0 m) or less. (If thedistance 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
12、 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 con
13、glomeration 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 ofco
14、ated 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 March 1, 2010. Published March 2010. Orginallyapproved in 1997. Last pr
15、evious edition approved in 2003 as C137603. DOI:10.1520/C1376-10.2For 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 webs
16、ite.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 withi
17、n a liteof glass.3.2.10.3 lite to litenonuniformity between individuallites.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.
18、11 pinholesmall area in which the coating is entirelyor partially absent.3.2.12 pyrolyticterm used to describe a method of manu-facture of a coating. Process applies the coating to hot glass,usually at the time of flat glass manufacturing.3.2.13 spota small, opaque blemish in the coating.3.2.14 stoc
19、k sizeflat glass sheets cut to standard dimen-sions that will be cut to smaller sizes in future use.3.2.15 vacuum depositionterm used to describe a methodof manufacture of a coating. The process applies the coating ina vacuum chamber to flat glass.3.2.16 vacuum sputteringsee vacuum deposition.4. Sig
20、nificance and Use4.1 This specification groups coated glass according toapplication. These groups are: vision, spandrel/nonvision, andoverhead. Similar but unique quality tolerances and inspectionguidelines have been outlined for each application. The glass tobe coated shall comply with the applicab
21、le provisions ofSpecification C1036 and Specification C1048.4.2 Coating blemishes are an inherent part of the glass-coating process. In addition, coatings can be damaged as aresult of improper transportation, storage, handling, fabrica-tion, or installation.4.3 Individual manufacturers should be con
22、tacted for rec-ommended handling, fabrication, installation, and applicationguidelines.5. Classification5.1 KindsCoated flat glass furnished under this specifica-tion shall be of the following kinds, as specified:5.1.1 Kind CVFlat transparent glass conforming to theapplicable requirements of Specifi
23、cation C1036 or Specifica-tion C1048 or both and having a coating applied to one or moreof the glass surfaces which further conforms with the require-ments hereinafter specified for coated vision glass.5.1.2 Kind COFlat transparent glass conforming to theapplicable requirements of Specification of C
24、1036 or Specifi-cation C1048 or both and having a coating applied to one ormore of the glass surfaces which further conforms withrequirements hereinafter specified for coated overhead glass.5.1.3 Kind CSFlat glass conforming to the applicablerequirements of Specifications of C1036 or SpecificationC1
25、048 or both and having a coating applied to one or more ofthe glass surfaces that further conforms with the requirementshereinafter specified for coated spandrel glass.NOTE 3Coated spandrel glass may have additional material designedto opacify the glass that is not included in the scope of this spec
26、ification.6. Requirements6.1 Blemishes for Coated Vision GlassThe type andnumber of blemishes shall be no greater than those specified inTable 1.6.2 Blemishes for Coated Overhead GlassThe type andnumber of blemishes shall be no greater than those specified inTable 2.6.3 Blemishes for Coated Spandrel
27、 GlassThe type andnumber of blemishes shall be no greater than those specified inTable 3.6.4 Nonuniformity for Coated GlassThe phenomenon ofnonuniformity in coated glass may be visible within anindividual lite, or between lites of glass, in a particular buildingor curtain wall. Consultation with sup
28、pliers and viewing fullsize mock-ups under typical site conditions and surroundinglandscape is highly recommended before construction.6.4.1 The scientific nature of controlling gas flow, electricalcharges, and coating layer densities require production toler-ances for light transmittance, reflectanc
29、e, and color of coatedglass products. Glass within allowable production tolerancesmay yield differences in reflected color or intensity of lighttransmittance or reflectance or both. Perceivable differencesare not immediate cause for rejection.6.4.2 Glass should be viewed as installed and from theext
30、erior of the building in daylight for color uniformitycomparison. Coating nonuniformity may occur from lite to litein a building (See Appendix X1.). It may also occur within alite in the form of edge-to-edge gradation, banding, mottling,or picture framing. In order to quantify color variation,measur
31、ements can be taken in the field with a handheldspectrophotometer.6.4.3 Color non-uniformity is defined using DE*ab as de-fined in Test Method D2244 for CIE 1976 L*A*B*, IlluminantTABLE 1 Quality Specifications for Cut Size Coated Vision Glass(Kind CV)ABlemishB,CCentral Area, in. (mm)DOuter Area, in
32、. (mm)DPinhole116 (1.6) max332 (2.4) maxSpot116 (1.6) max332 (2.4) maxCoating scratch 2 (50) max length 3 (75) max lengthMark/contaminant 2 (50) max length 3 (75) max lengthCoating rub none allowed length plus width not toexceed34 (19)Crazing none allowed none allowedCorrosion none allowed none allo
33、wedAThese specifications apply to cut size glass only. For specifications of stocksize glass contact the manufacturer.BThe glass shall be inspected, in transmission, at a distance of 10 ft (3.0 m) ata viewing angle of 90 to the specimen against a bright uniform background. If ablemish is readily app
34、arent under these viewing conditions, the above criteriaapplies.CNo more than two readily apparent blemishes are allowed in a 3-in. (75-mm)diameter circle, and no more than five readily apparent blemishes are allowed ina 12-in. (300-mm) diameter circle.DThe central area is considered to form a squar
35、e or rectangle defined by thecenter 80 % of the length and 80 % of the width dimensions centered on a lite ofglass. The remaining area is considered the outer area.C1376 102D65, and 10 Observer looking straight at the glass (normalincidence, or 90, to the glass plane). Using a reference targetestabl
36、ished by the manufacturer, or the average color measure-ments as defined below, no color readings shall exceed aDE*ab of 4.5. If a manufacturers color target is not used, thefollowing procedure for establishing a reference shall beincorporated:6.4.3.1 Using a mobile/handheld spectrophotometer, color
37、readings will be taken and documented from the exterior of thebuilding from 10 units of like construction that have beeninstalled in the same plane and elevation of the building anddeemed to be acceptable by the manufacturer in terms of theirappearance. If it is not physically practical or possible
38、tomeasure 10 units, as many units as possible shall be measured.6.4.3.2 For lite to lite nonuniformity, establishing a refer-ence will be done by taking a minimum of 1 reading peracceptable unit in the central area of each unit within 6 2 in. ofgeometric center. If access to the glass does not allow
39、 you toreach the geometric center, measure the glass as close to centeras possible. Average the value of the readings taken on each ofthe units (10 minimum ideally) to determine the target forcalculating DE*ab. Once the target has been established, take ameasurement on the unit in question and calcu
40、late DE*ab.6.4.3.3 For edge to edge, banding, mottling, or pictureframing nonuniformity within a unit, readings shall be taken inlocations within the lite representing areas of visual colordifference. The DE*ab calculated between these measurementsshall be less than 4.5.6.4.4 Units may have a percei
41、ved color difference due tooff-angle (non-normal incidence) viewing. This is particularlytrue with highly selective solar control coatings which areengineered to maximize visible light transmission and mini-mize infrared transmission. This angular color variation is notreason for rejection if the gl
42、ass in question does not exceed theE*ab of 4.5 using the normal incidence measurement proce-dure outlined above.NOTE 4Design professionals and building owners should be awarethat certain coated glass products will yield color differences when used inadjacent vision and spandrel area conditions and w
43、hen used in laminatedglass constructions or on different glass thickness.NOTE 5Refer to manufacturer for blemishes not listed in this speci-fication.7. Keywords7.1 coated glass; flat glass; glazing; nonuniformity; over-head glass; pyrolytic coating; spandrel glass; sputtered coat-ings; vacuum deposi
44、tion coating; vision glassTABLE 2 Quality Specifications for Cut Size Coated OverheadGlass (Kind CO)ABlemishB,CCentral Area, in. (mm)DOuter Area, in. (mm)DPinhole332 (2.4) max18 (3.2) maxSpot332 (2.4) max18 (3.2) maxCoating scratch 3 (75) max length 4 (100) max lengthMark/contaminant 3 (75) max leng
45、th 4 (100) max lengthCoating rub length plus width not toexceed34 (19)Length plus width not toexceed34 (19)Crazing none allowed none allowedCorrosion none allowed none allowedAThese specifications apply to cut size glass only. For specifications of stocksize glass contact the manufacturer.BThe glass
46、 shall be inspected, in transmission, at a distance of 15 ft (4.6 m) ata viewing angle of 90 to the specimen against a bright uniform background. If ablemish is readily apparent under these viewing conditions, the above criteriaapplies.CNo more than two readily apparent blemishes are allowed in a 3-
47、in. (75-mm)diameter circle, and no more than five readily apparent blemishes are allowed ina 12-in. (300-mm) diameter circle.DThe central area is considered to form a square or rectangle defined by thecenter 80 % of the length and 80 % of the width dimensions centered on a lite ofglass. The remainin
48、g area is considered the outer area.TABLE 3 Quality Specifications for Cut Size Coated SpandrelGlass (Kind CS)ABlemishB,CRange Number 1,in. (mm)DRange Number 2,in. (mm)DPinhole18 (3.2) max532 (4.0) maxSpot18 (3.2) max532 (4.0) maxCoating scratch 3 (75) max length 6 (150) max lengthMark/contaminant 3
49、 (75) max length 6 (150) max lengthCoating rub none allowed length plus width not toexceed34 (19)Crazing none allowed none allowedCorrosion none allowed none allowedAThese specifications apply to cut size glass only. For specifications of stocksize glass contact the manufacturer.BThe glass shall be inspected, in reflection, at a distance equal to or greater than15 ft (4.6 m) at a viewing angle of 90 to the specimen under uniform lightingconditions. If a blemish is readily apparent under these viewing conditions, theabove c
