ASTM C1503-24

Standard Specification for Silvered Flat Glass Mirror

ABSTRACT
This specification covers the requirements for silvered flat glass mirrors of rectangular shape supplied as cut sizes, stock sheets or as lehr ends and to which no further processing (such as edgework or other fabrication) has been done. The quality requirements of silvered annealed monolithic clear and tinted flat glass mirrors up to a certain thickness are also discussed. The mirrors are intended to be used indoors for mirror glazing, for components of decorative accessories or for similar uses. The mirrors are not intended for use in environments where high humidity or airborne corrosion promoters, or both, are consistently present (such as swimming pool areas, ocean-going vessels, chemical laboratories and other corrosive environments). The classification of mirrors are according to the following properties: grades, cut size, stock sheet, lehr end, select quality, glazing quality, color (clear or tinted), and thickness. Different test methods shall be performed in order to determine or measure the following properties: reflectance, silver coating appearance, coating resistance, blemish (point and linear blemishes), dimension, and squareness.
SCOPE
1.1 This specification covers the requirements for silvered flat glass mirrors of rectangular shape supplied as cut sizes, stock sheets, or as lehr ends and to which no further processing (such as edgework or other fabrication) has been done.  
1.2 This specification covers the quality requirements of silvered annealed monolithic clear and tinted flat glass mirrors only, up to 6 mm (1/4 in.) thick. The mirrors are intended to be used indoors for mirror glazing, for components of decorative accessories or for similar uses.  
1.3 This specification does not address safety glazing materials nor requirements for mirror applications. Consult model building codes and other applicable standards for safety glazing applications.  
1.4 Mirrors covered in this specification are not intended for use in environments where high humidity or airborne corrosion promoters, or both, are consistently present (such as swimming pool areas, ocean-going vessels, chemical laboratories, and other corrosive environments).  
1.5 The dimensional values stated in metric units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.  
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 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-Jan-2024
• ICS: 97.140 - Furniture
• Technical Committee: C14 - Glass and Glass Products
• Drafting Committee: C14.08 - Flat Glass

Relations

• Replaces: ASTM C1503-18 - Standard Specification for Silvered Flat Glass Mirror
• Effective Date: 01-Feb-2024
• Referred By: ASTM C1172-19 - Standard Specification for Laminated Architectural Flat Glass
• Effective Date: 01-Feb-2024
• Referred By: ASTM C1349-17 - Standard Specification for Architectural Flat Glass Clad Polycarbonate
• Effective Date: 01-Feb-2024

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: C1503 − 24
Standard Specification for
1
Silvered Flat Glass Mirror
This standard is issued under the fixed designation C1503; 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 2. Referenced Documents
2.1 Reference to these documents shall be the latest issue
1.1 This specification covers the requirements for silvered
unless otherwise specified by the authority applying this
flat glass mirrors of rectangular shape supplied as cut sizes,
specification:
stock sheets, or as lehr ends and to which no further processing
2
(such as edgework or other fabrication) has been done.
2.2 ASTM Standards:
B117 Practice for Operating Salt Spray (Fog) Apparatus
1.2 This specification covers the quality requirements of
C162 Terminology of Glass and Glass Products
silvered annealed monolithic clear and tinted flat glass mirrors
C1036 Specification for Flat Glass
1
only, up to 6 mm ( ⁄4 in.) thick. The mirrors are intended to be
E903 Test Method for Solar Absorptance, Reflectance, and
used indoors for mirror glazing, for components of decorative
Transmittance of Materials Using Integrating Spheres
accessories or for similar uses.
3. Terminology
1.3 This specification does not address safety glazing ma-
3.1 Definitions:
terials nor requirements for mirror applications. Consult model
3.1.1 Refer to Terminology C162 and the standards refer-
building codes and other applicable standards for safety
enced in 2.2 as appropriate.
glazing applications.
3.1.2 associated distortion, n—alteration of viewed images
1.4 Mirrors covered in this specification are not intended for
cause by variations in glass flatness in inhomogeneous portions
use in environments where high humidity or airborne corrosion
within the glass.
promoters, or both, are consistently present (such as swimming
3.1.3 blemishes, n—imperfections in the body, on the sur-
pool areas, ocean-going vessels, chemical laboratories, and
face or in the silver coating of the mirror; for the purpose of
other corrosive environments).
this specification blemishes are divided into three categories:
1.5 The dimensional values stated in metric units are to be
3.1.3.1 linear blemishes, n—scratches, rubs, digs, and other
regarded as the standard. The inch-pound units given in
similar imperfections on either surface of the glass substrate.
parentheses are for information only.
3.1.3.2 point blemishes, n—crush, knots, dirt, stones, gas-
eous inclusions (seeds and bubbles), tin particles, and other
1.6 This standard does not purport to address all of the
similar imperfections in the body of the glass substrate.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
3.1.3.3 silver film blemishes, n—visible clouding, spot silver
priate safety, health, and environmental practices and deter-
faults, and other similar imperfections of the silver coating.
mine the applicability of regulatory limitations prior to use.
3.1.4 chip, n—an imperfection on the edge of a mirror lite
1.7 This international standard was developed in accor-
due to breakage of a small fragment out of an otherwise regular
dance with internationally recognized principles on standard- surface.
ization established in the Decision on Principles for the
3.1.4.1 shell chip, n—a circular indentation in the mirror
Development of International Standards, Guides and Recom-
edge due to breakage of a small fragment.
mendations issued by the World Trade Organization Technical
3.1.4.2 v-chip, n—a V-shaped chip indentation in the mirror
Barriers to Trade (TBT) Committee.
edge due to breakage of a small fragment.
3.1.4.3 chip width, n—the perpendicular distance from the
edge of the mirror to the inner edge of the chip.
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
2
Glass. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Feb. 1, 2024. Published February 2024. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 2001. Last previous edition approved in 2018 as C1503 – 18. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C1503-24. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

-
...

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: C1503 − 18 C1503 − 24
Standard Specification for
1
Silvered Flat Glass Mirror
This standard is issued under the fixed designation C1503; 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 requirements for silvered flat glass mirrors of rectangular shape supplied as cut sizes, stock sheets,
or as lehr ends and to which no further processing (such as edgework or other fabrication) has been done.
1.2 This specification covers the quality requirements of silvered annealed monolithic clear and tinted flat glass mirrors only, up
1
to 6 mm ( ⁄4 in.) thick. The mirrors are intended to be used indoors for mirror glazing, for components of decorative accessories
or for similar uses.
1.3 This specification does not address safety glazing materials nor requirements for mirror applications. Consult model building
codes and other applicable standards for safety glazing applications.
1.4 Mirrors covered in this specification are not intended for use in environments where high humidity or airborne corrosion
promoters, or both, are consistently present (such as swimming pool areas, ocean-going vessels, chemical laboratories, and other
corrosive environments).
1.5 The dimensional values stated in metric units are to be regarded as the standard. The inch-pound units given in parentheses
are for information only.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.7 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:
B117 Practice for Operating Salt Spray (Fog) Apparatus
C162 Terminology of Glass and Glass Products
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 Aug. 1, 2018Feb. 1, 2024. Published August 2018February 2024. Originally approved in 2001. Last previous edition approved in 20132018 as
C1503 – 08 (2013).C1503 – 18. DOI: 10.1520/C1503-18.10.1520/C1503-24.
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

---------------------- Page: 1 ----------------------
C1503 − 24
C1036 Specification for Flat Glass
E903 Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres
3. Terminology
3.1 Definitions:
3.1.1 Refer to Terminology C162 and the standards referenced in 2.2 as appropriate.
3.1.2 associated distortion, n—alteration of viewed images cause by variations in glass flatness in inhomogeneous portions within
the glass.
3.1.3 blemishes, n—imperfections in the body, on the surface or in the silver coating of the mirror; for the purpose of this
specification blemishes are divided into three categories:
3.1.3.1 linear blemishes, n—scratches, rubs, digs, and other similar imperfections on either surface of the glass substrate.
3.1.3.2 point blemishes, n—crush, knots, dirt, stones, gaseous inclusions (seeds and bubbles), tin particles, and other similar
imperfections in the body of the glass substrate.
3.1.3.3 silver film blemishes, n—visible clouding, spot silver faults, and other similar imperfections of the silver coating.
3.1.4 chip, n—an imperfection on the edge of a mirror lite due to breakage of a small fragment out of an otherwise regular surface.
3.1.4.1 shell chip, n—a circular indentation in the mirror edge due t
...