1、Designation: C1376 10C1376 15Standard 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 la
2、st 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 quality requirements for coatings applied to glass for use in buildi
3、ngglazing.1.2 The coatings covered are applied to the glass using either pyrolytic or vacuum (sputtering) deposition methods and aretypically applied to control solar heat gain, energy performance, comfort level, and condensation and enhance the aesthetic of thebuilding.1.3 This specification addres
4、ses blemishes related to the coating only. It does not address glass blemishes, applied ceramic frits,and organic films.1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information
5、only and are not considered standard.2. Referenced Documents2.1 Reference to these documents shall be the latest issue unless otherwise specified by the authority applying this specification.2.2 ASTM Standards:2C162 Terminology of Glass and Glass ProductsC1036 Specification for Flat GlassC1048 Speci
6、fication for Heat-Strengthened and Fully Tempered Flat GlassD2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates3. Terminology3.1 DefinitionsRefer to Terminology C162, Specification C1036 or Specification C1048 as appropriate:3.1.1 b
7、lemishes in flat glassrefer to Specifications C1036 or C1048, as appropriate.NOTE 1These definitions do not apply to in-service damage.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
8、 in which the lower edge of the glass is more than 6 ft (1.8 m) above(the viewers) floor level or cannot be approached within 10 ft (3.0 m); the glass can usually but not always be viewed in bothtransmission and reflection; the glass is usually sloping in from the vertical plane, however, may also b
9、e vertical or sloping outfrom the vertical plane.NOTE 2The following terms are designed to guide the user to the appropriate inspection charts and requirements.3.2.2 coated spandrel glassglass used in an installation in which the glass is only viewed in reflection from the buildingsexterior. The gla
10、ss is usually installed vertically, however, may be at a slope to the vertical plane.3.2.3 coated vision glassglass used in an installation in which 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 in transmission or reflection; the gla
11、ss is usually vertical, however, may alsobe sloping in or out from the vertical plane; and the glass can be approached within 10 ft (3.0 m) or less. (If the distance is greaterthan 10 ft (3.0 m), see coated overhead glass.)1 This specification is under the jurisdiction ofASTM Committee C14 on Glass
12、and Glass Products and is the direct responsibility of Subcommittee C14.08 on Flat Glass.Current edition approved March 1, 2010Nov. 1, 2015. Published March 2010November 2015. OrginallyOriginally approved in 1997. Last previous edition approved in20032010 as C137603.C1376 10. DOI: 10.1520/C1376-10.
13、10.1520/C1376-15.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is
14、 intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the
15、current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.2.4 coating ruba surface abrasion of appreciable width that has partial, or complete, remo
16、val of the coating producing a hazyappearance.3.2.5 coating scratchpartial, or complete, removal of the coating along a thin straight or curved line.3.2.6 corrosionchange in the color or level of reflected or transmitted light over all or part of the glass surface as a result ofdegradation of the co
17、ating from external sources.3.2.7 crazinga random conglomeration of fine lines or cracks in the coating.3.2.8 cut sizeflat glass sheets cut to specific dimensions.3.2.9 mark/contaminanta deposit of foreign material on the glass surface.3.2.10 nonuniformityobvious variation in reflected color of the
18、coating within a lite of glass or between two lites of coatedglass in the same building, or both.3.2.10.1 bandingwide or narrow areas of nonuniformity with demarcation that appears as a linear line and may occuranywhere on a lite.3.2.10.2 edge to edgegradient nonuniformity within a lite of glass.3.2
19、.10.3 lite to litenonuniformity between individual lites.3.2.10.4 mottlingsplotchy or patchy nonuniformity (not to be 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 ar
20、ea in which the coating is entirely or partially absent.3.2.12 pyrolyticterm used to describe a method of manufacture of a coating. Process applies the coating to hot glass, usuallyat the time of flat glass manufacturing.3.2.13 spota small, opaque blemish in the coating.3.2.14 stock sizeflat glass s
21、heets cut to standard dimensions that will be cut to smaller sizes in future use.3.2.15 vacuum depositionterm used to describe a method of manufacture of a coating. The process applies the coating in avacuum chamber to flat glass.3.2.16 vacuum sputteringsee vacuum deposition.4. Significance and Use4
22、.1 This specification groups coated glass according to application. These groups are: vision, spandrel/nonvision, and overhead.Similar but unique quality tolerances and inspection guidelines have been outlined for each application.The glass to be coated shallcomply with the applicable provisions of
23、SpecificationSpecifications C1036 and Specification C1048.4.2 Coating blemishes are an inherent part of the glass-coating process. In addition, coatings can be damaged as a result ofimproper transportation, storage, handling, fabrication, or installation.4.3 Individual manufacturers should be contac
24、ted for recommended handling, fabrication, installation, and applicationguidelines.5. Classification5.1 KindsCoated flat glass furnished under this specification shall be of the following kinds, as specified:5.1.1 Kind CVFlat transparent glass conforming to the applicable requirements of Specificati
25、on C1036 or SpecificationC1048, or both, and having a coating applied to one or more of the glass surfaces which further conforms with the requirementshereinafter specified for coated vision glass.5.1.2 Kind COFlat transparent glass conforming to the applicable requirements of Specification of C1036
26、 or SpecificationC1048, or both, and having a coating applied to one or more of the glass surfaces which further conforms with requirementshereinafter specified for coated overhead glass.5.1.3 Kind CSFlat glass conforming to the applicable requirements of Specifications of Specification C1036 or Spe
27、cificationC1048, or both, and having a coating applied to one or more of the glass surfaces that further conforms with the requirementshereinafter specified for coated spandrel glass.NOTE 3Coated spandrel glass may have additional material designed to opacify the glass that is not included in the sc
28、ope of this specification.6. Requirements6.1 Blemishes for Coated Vision GlassThe type and number of blemishes shall be no greater than those specified in Table 1.6.2 Blemishes for Coated Overhead GlassThe type and number of blemishes shall be no greater than those specified in Table2.C1376 1526.3 B
29、lemishes for Coated Spandrel GlassThe type and number of blemishes shall be no greater than those specified in Table3.6.4 Nonuniformity for Coated GlassThe phenomenon of nonuniformity in coated glass may be visible within an individuallite, or between lites of glass, in a particular building or curt
30、ain wall. Consultation with suppliers and viewing full size mock-upsunder typical site conditions and surrounding landscape is highly recommended before construction.6.4.1 The scientific nature of controlling gas flow, electrical charges, and coating layer densities require production tolerancesfor
31、light transmittance, reflectance, and color of coated glass products. Glass within allowable production tolerances may yielddifferences in reflected color or intensity of light transmittance or reflectance, or both. Perceivable differences are not immediatecause for rejection.TABLE 1 Quality Specifi
32、cations for Cut Size Coated Vision Glass(Kind CV)ABlemishB,C Central Area, in. (mm)D Outer Area, in. (mm)DPinhole 116 (1.6) max 332 (2.4) maxSpot 116 (1.6) max 332 (2.4) maxCoating scratch 2 (50) max length 3 (75) max lengthMark/contaminant 2 (50) max length 3 (75) max lengthCoating rub none allowed
33、 length plus width not toexceed 34 (19)Crazing none allowed none allowedCorrosion none allowed none allowedA These specifications apply to cut size glass only. For specifications of stock sizeglass glass, and blemishes not listed, contact the manufacturer.B The glass shall be inspected, in transmiss
34、ion, at a distance of 10 ft (3.0 m) at aviewing angle of 90 to the specimen against a bright uniform background. If ablemish is readily apparent under these viewing conditions, the above criteriaapplies.C No more than two readily apparent blemishes are allowed in a 3-in. (75-mm)diameter circle, and
35、no more than five readily apparent blemishes are allowed ina 12-in. (300-mm) diameter circle.D The 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 remaining area is considered the outer
36、area.TABLE 2 Quality Specifications for Cut Size Coated OverheadGlass (Kind CO)ABlemishB,C Central Area, in. (mm)D Outer Area, in. (mm)DPinhole 332 (2.4) max 18 (3.2) maxSpot 332 (2.4) max 18 (3.2) maxCoating scratch 3 (75) max length 4 (100) max lengthMark/contaminant 3 (75) max length 4 (100) max
37、lengthCoating rub length plus width not toexceed 34 (19)Length plus width not toexceed 34 (19)Crazing none allowed none allowedCorrosion none allowed none allowedA These specifications apply to cut size glass only. For specifications of stock sizeglass glass, and blemishes not listed, contact the ma
38、nufacturer.B The glass shall be inspected, in transmission, at a distance of 15 ft (4.6 m) at aviewing angle of 90 to the specimen against a bright uniform background. If ablemish is readily apparent under these viewing conditions, the above criteriaapplies.C No more than two readily apparent blemis
39、hes 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.D The 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 li
40、te ofglass. The remaining area is considered the outer area.C1376 1536.4.2 Glass should be viewed as installed and from the exterior of the building in daylight for color uniformity comparison.Coating nonuniformity may occur from lite to lite in a building (See(see Appendix X1.).). It may also occur
41、 within a lite in theform of edge-to-edge gradation, banding, mottling, or picture framing. In order to quantify color variation, measurements can betaken in the field with a handheld spectrophotometer.6.4.3 Color non-uniformity is defined using E*ab as defined in Test Method D2244 for CIE 1976 L*A*
42、B*, Illuminant D65,and 10 Observer looking straight at the glass (normal incidence, or 90, to the glass plane). Using a reference target establishedby the manufacturer, or the average color measurements as defined below, no color readings shall exceed a E*ab of 4.5. If amanufacturers color target is
43、 not used, the following procedure for establishing a reference shall be incorporated:6.4.3.1 Using a mobile/handheld spectrophotometer, color readings will be taken and documented from the exterior of thebuilding from 10ten units of like construction that have been installed in the same plane and e
44、levation of the building and deemedto be acceptable by the manufacturer in terms of their appearance. If it is not physically practical or possible to measure 10ten units,as many units as possible shall be measured.6.4.3.2 For lite to lite nonuniformity, establishing a reference will be done by taki
45、ng a minimum of 1one reading per acceptableunit in the central area of each unit within 6 2 in. of geometric center. If access to the glass does not allow you to reach thegeometric center, measure the glass as close to center as possible. Average the value of the readings taken on each of the units(
46、10(ten minimum ideally) to determine the target for calculating E*ab. Once the target has been established, take a measurementon the unit in question and calculate E*ab.6.4.3.3 For edge to edge, banding, mottling, or picture framing nonuniformity within a unit, readings shall be taken in locationswi
47、thin the lite representing areas of visual color difference. The E*ab calculated between these measurements shall be less than4.5.6.4.4 Units may have a perceived color difference due to off-angle (non-normal incidence) viewing.This is particularly true withhighly selective solar control coatings wh
48、ich are engineered to maximize visible light transmission and minimize infraredtransmission. This angular color variation is not reason for rejection if the glass in question does not exceed the E*ab of 4.5 usingthe normal incidence measurement procedure outlined above.NOTE 4Design professionals and
49、 building owners should be aware that certain coated glass products will yield color differences when used in adjacentvision and spandrel area conditions and when used in laminated glass constructions or on different glass thickness.NOTE 5Refer to manufacturer for blemishes not listed in this specification.7. Keywords7.1 coated glass; flat glass; glazing; nonuniformity; overhead glass; pyrolytic coating; spandrel glass; sputtered coatings;vacuum deposition coating; vision glassTABLE 3 Quality Specifications for Cut Si
