ASTM C1376-21a

Standard Specification for Pyrolytic and Vacuum Deposition Coatings on Flat Glass

ABSTRACT
This specification covers the optical and aesthetic quality requirements for coatings applied to glass for use in building glazing. 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. This specification groups coated glass according to application. These groups are: vision, spandrel/nonvision, and overhead. Coated flat glass furnished under this specification shall be of the following kinds: Kind CV; Kind CO; and Kind CS.
SCOPE
1.1 This specification covers the optical and aesthetic quality requirements for pyrolytic and vacuum deposition coatings applied on flat glass for use in building glazing.  
1.2 The coatings are applied on the glass using either pyrolytic or vacuum sputtering deposition methods to control solar heat gain, energy performance, comfort level, and condensation and to 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 glazing units of vertical and sloped orientations as installed in the building exterior.  
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.

General Information

• Status: Published
• Publication Date: 31-Aug-2021
• ICS: 81.040.20 - Glass in building
• Technical Committee: C14 - Glass and Glass Products
• Drafting Committee: C14.08 - Flat Glass

Standards Content (Sample)

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.
Designation:C1376 −21a
Standard Specification for
1
Pyrolytic and Vacuum Deposition Coatings on Flat Glass
This standard is issued under the fixed designation C1376; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope C1048 Specification for Heat-Strengthened and Fully Tem-
pered Flat Glass
1.1 This specification covers the optical and aesthetic qual-
D2244 Practice for Calculation of Color Tolerances and
ity requirements for pyrolytic and vacuum deposition coatings
Color Differences from Instrumentally Measured Color
applied on flat glass for use in building glazing.
Coordinates
1.2 The coatings are applied on the glass using either
pyrolytic or vacuum sputtering deposition methods to control
3. Terminology
solar heat gain, energy performance, comfort level, and con-
3.1 Definitions:
densation and to enhance the aesthetic of the building.
3.1.1 Refer to Terminology C162 or Specification C1036 or
1.3 This specification addresses blemishes related to the
C1048, as appropriate.
coating only. It does not address glass blemishes, applied
3.1.2 blemishes in flat glass—refer to Specification C1036
ceramic frits to spandrel glass, and organic film opacifiers.
or C1048, as appropriate.
1.4 The Nonuniformity for Coated Glass requirements,
3.1.3 These definitions do not apply to in-service damage.
given in 6.10, pertain to glazing units of vertical and sloped
3.2 Definitions of Terms Specific to This Standard:
orientations as installed in the building exterior.
3.2.1 coated overhead glass—glassusedinaninstallationin
1.5 The values stated in inch-pound units are to be regarded
which the lower edge of the glass is more than 6 ft (1.8 m)
as standard. The values given in parentheses are mathematical
above(theviewer’s)floorlevelorcannotbeapproachedwithin
conversions to SI units that are provided for information only
10 ft (3.0 m); the glass can usually but not always be viewed
and are not considered standard.
in both transmission and reflection; the glass is usually sloping
1.6 This international standard was developed in accor-
in from the vertical plane, however, may also be vertical or
dance with internationally recognized principles on standard-
sloping out from the vertical plane.
ization established in the Decision on Principles for the
3.2.2 coated spandrel/non-vision glass—glass used in an
Development of International Standards, Guides and Recom-
installation in which the glass is only viewed in reflection from
mendations issued by the World Trade Organization Technical
the building’s exterior; the glass is usually installed vertically,
Barriers to Trade (TBT) Committee.
however, may be at a slope to the vertical plane.
2. Referenced Documents
3.2.3 coated vision glass—glass used in an installation in
which the lower edge of the glass is a maximum of 6 ft (1.8 m)
2.1 Reference to these documents shall be the latest issue
above (the viewer’s) floor level; the glass can be viewed in
unless otherwise specified by the authority applying this
transmission or reflection; the glass is usually vertical,
specification.
however, may also be sloping in or out from the vertical plane;
2
2.2 ASTM Standards:
and the glass can be approached within 10 ft (3.0 m) or less. If
C162 Terminology of Glass and Glass Products
the distance is greater than 10 ft (3.0 m), see coated overhead
C1036 Specification for Flat Glass
glass, which would apply.
3.2.4 coating rub—a surface abrasion of appreciable width
1
This specification is under the jurisdiction of ASTM Committee C14 on Glass
that has partial or complete removal of the coating producing
and Glass Products and is the direct responsibility of Subcommittee C14.08 on Flat
a hazy appearance.
Glass.
Current edition approved Sept. 1, 2021. Published November 2021. Originally
3.2.5 coating scratch—partial or complete removal of the
approved in 1997. Last previous edition approved in 2021 as C1376 – 21. DOI:
coating along a thin straight or curved line.
10.1520/C1376-21A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3.2.6 corrosion—change in the color or level of reflected or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
transmitted light over all or part of the glass surface as a result
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. of degradation of the coating from external sources.
Copyright © ASTM International, 100 Barr Harbor Drive,
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it 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 current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1376 − 21 C1376 − 21a
Standard Specification for
1
Pyrolytic and Vacuum Deposition Coatings on Flat Glass
This standard is issued under the fixed designation C1376; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification covers the optical and aesthetic quality requirements for pyrolytic and vacuum deposition coatings applied
to on flat glass for use in building glazing.
1.2 The coatings covered are applied toon the glass using either pyrolytic or vacuum (sputtering)sputtering deposition methods
and are typically applied to control solar heat gain, energy performance, comfort level, and condensation and to 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.orientations as installed in the building exterior.
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.
2. Referenced Documents
2.1 Reference to these documents shall be the latest issue unless otherwise specified by the authority applying this specification.
2
2.2 ASTM Standards:
C162 Terminology of Glass and Glass Products
C1036 Specification for Flat Glass
C1048 Specification for Heat-Strengthened and Fully Tempered Flat Glass
D2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
3. Terminology
3.1 Definitions:
1
This specification is under the jurisdiction of ASTM Committee C14 on Glass and Glass Products and is the direct responsibility of Subcommittee C14.08 on Flat Glass.
Current edition approved Feb. 1, 2021Sept. 1, 2021. Published March 2021November 2021. Originally approved in 1997. Last previous edition approved in 20152021
as C1376 – 15.C1376 – 21. DOI: 10.1520/C1376-21.10.1520/C1376-21A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C1376 − 21a
3.1.1 Refer to Terminology C162 or Specification C1036 or C1048, as appropriate.
3.1.2 blemishes in flat glass—refer to Specification C1036 or C1048, as appropriate.
3.1.3 These definitions do not apply to in-service damage.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 coated overhead glass—glass used in an installation in which the lower edge of the glass is more than 6 ft (1.8 m) above
(the viewer’s) floor level or cannot be approached within 10 ft (3.0 m); the glass can usually but not always be viewed in both
transmission and reflection; the glass is usually sloping in from the vertical plane, however, may also be vertical or sloping out
from the vertical plane.
3.2.2 coated spandrel/non-vision glass—glass used in an installation in which the glass is only viewed in reflection from the
building’s exterior. Theexterior; the glass is usually installed vertically, however, may be at a slope to the vertical planeplane.
3.2.3 coated vision glass—glass used in an installation in which the lower edge of the glass is a maximum of 6 ft (1.8 m) above
(the viewer’s) floor level; the glass can be viewed in transmission 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. If the distance is greater
than 10 ft (3.0 m), see coated overhead glass
...