ASTM C1376-21

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 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.

General Information

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

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C1376 −21
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 C1036 Specification for Flat Glass
C1048 Specification for Heat-Strengthened and Fully Tem-
1.1 This specification covers the optical and aesthetic qual-
pered Flat Glass
ity requirements for coatings applied to glass for use in
D2244 Practice for Calculation of Color Tolerances and
building glazing.
Color Differences from Instrumentally Measured Color
1.2 The coatings covered are applied to the glass using
Coordinates
eitherpyrolyticorvacuum(sputtering)depositionmethodsand
are typically applied to control solar heat gain, energy
3. Terminology
performance, comfort level, and condensation and enhance the
3.1 Definitions:
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 as installed in the building exterior
3.2 Definitions of Terms Specific to This Standard:
glazing units of vertical and sloped orientations.
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
in from the vertical plane, however, may also be vertical or
1.6 This international standard was developed in accor-
sloping out from the vertical plane.
dance with internationally recognized principles on standard-
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
3.2.3 coated vision glass—glass used in an installation in
2. Referenced Documents
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
and the glass can be approached within 10 ft (3.0 m) or less. If
2.2 ASTM Standards:
the distance is greater than 10 ft (3.0 m), see coated overhead
C162 Terminology of Glass and Glass Products
glass.
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 Feb. 1, 2021. Published March 2021. Originally
3.2.5 coating scratch—partial, or complete, removal of the
approved in 1997. Last previous edition approved in 2015 as C1376 – 15. DOI:
coating along a thin straight or curved line.
10.1520/C1376-21.
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, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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C1376−21
3.2.7 crazing—a random conglomeration of fine lines or 5.1.1 K
...

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 − 15 C1376 − 21
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 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,
frits to spandrel glass, and organic films.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.
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—Refer to Terminology C162, Specification C1036 or Specification C1048 as appropriate:
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 Nov. 1, 2015Feb. 1, 2021. Published November 2015March 2021. Originally approved in 1997. Last previous edition approved in 20102015 as
C1376 – 10.C1376 – 15. DOI: 10.1520/C1376-15.10.1520/C1376-21.
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 − 21
3.1.1 blemishes in flat glass—refer to Specifications C1036 or C1048, as appropriate.
3.1.2 These definitions do not apply to in-service damage.
3.1 Definitions:
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 spandrelspandrel/non-vision glass—glass used in an installation in which the glass is only viewed in reflection from
the building’s exterior. The glass is usually installed vertically, however, may be at a slope to the vertical plane.plane
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 pl
...