Glass in building - Coated glass - Part 1: Physical defects

This part of ISO 11479 specifies optical quality requirements for coatings applied to glass using either pyrolytic, sol-gel or vacuum (sputtering) deposition methods for use in building glazing. More specifically, this part of ISO 11479 relates to low-e and solar-control coated glass. This part of ISO 11479 is not applicable to patterned or other optically distorting glass.

Verre dans la construction — Verre à couche — Partie 1: Défauts physiques

General Information

Status
Published
Publication Date
29-Sep-2011
Current Stage
9093 - International Standard confirmed
Start Date
14-Jun-2024
Completion Date
13-Dec-2025

Overview

ISO 11479-1:2011 - Glass in building - Coated glass - Part 1: Physical defects specifies optical quality and inspection requirements for coatings applied to glass used in building glazing. It covers coatings deposited by pyrolytic (online), sol‑gel (offline) and vacuum (sputtering) methods and is aimed at low‑e and solar‑control coated glass. Patterned or optically distorting glass are excluded.

Key topics and requirements

  • Scope and definitions: Defines coated glass, substrate types, deposition methods (pyrolytic, sol‑gel, vacuum) and defect terminology (spot, pinhole, scratch, stain, crazing, corrosion, coating rub).
  • Visual detection method: Defects must be detected visually in transmission and/or reflection under daylight or an artificial sky (per CIE 13.3). Accepted correlated colour temperature is 4 000–6 000 K and illuminance 400–20 000 lx.
  • Examination conditions:
    • Minimum viewing distance 3 m.
    • Observer illumination behind the observer for reflection, behind the glass for transmission.
    • Viewing angle (between surface normal and the light beam to the observer) shall not exceed 30°.
    • For finished panes, inspect the central area (centre 80% length × 80% height) and the remaining edge area; for stock/ jumbo sheets, edge = 10 cm border.
  • Punctual defect assessment: Measure and record spots, pinholes and scratches (size, number, position, clusters). For scratches note length and spacing.
  • Acceptance criteria (high level):
    • Spots/pinholes: defects >3.0 mm are not allowed; defects ≤2.0 mm are allowed; intermediate sizes have restricted counts (see standard for exact limits).
    • Scratches: ≤75 mm allowed in central/edge; >75 mm allowed in central only if not visually disturbing; >75 mm not allowed in edge area.
    • Coating rub: none in central area; limited size allowed at edges (see standard).
    • Crazing, corrosion, stains: not allowed.
    • Global constraint: total spots/pinholes/scratches ≤ 5 per 300 mm × 300 mm square region.

Applications and practical value

  • Ensures consistent optical quality and aesthetic performance for low‑e and solar‑control glazing used in façades, windows and curtain walls.
  • Supports quality control in manufacturing lines (pyrolytic, sol‑gel, vacuum) and during fabrication, site inspection, or final acceptance.
  • Helps architects, façade engineers and building owners specify acceptable visual performance and avoid coating‑related complaints.

Who should use this standard

  • Glass manufacturers and coating plants
  • Glazing fabricators and quality inspectors
  • Façade consultants, architects and specifiers
  • Building contractors and façade installers

Related standards

  • ISO 11479‑2 - Glass in building - Coated glass - Part 2: Colour of façade
  • CIE 13.3 - Reference for artificial sky and illumination used during inspection

For full inspection procedures, detailed acceptance tables and figures, refer to ISO 11479-1:2011.

Standard

ISO 11479-1:2011 - Glass in building — Coated glass — Part 1: Physical defects Released:30. 09. 2011

English language
7 pages
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Frequently Asked Questions

ISO 11479-1:2011 is a standard published by the International Organization for Standardization (ISO). Its full title is "Glass in building - Coated glass - Part 1: Physical defects". This standard covers: This part of ISO 11479 specifies optical quality requirements for coatings applied to glass using either pyrolytic, sol-gel or vacuum (sputtering) deposition methods for use in building glazing. More specifically, this part of ISO 11479 relates to low-e and solar-control coated glass. This part of ISO 11479 is not applicable to patterned or other optically distorting glass.

This part of ISO 11479 specifies optical quality requirements for coatings applied to glass using either pyrolytic, sol-gel or vacuum (sputtering) deposition methods for use in building glazing. More specifically, this part of ISO 11479 relates to low-e and solar-control coated glass. This part of ISO 11479 is not applicable to patterned or other optically distorting glass.

ISO 11479-1:2011 is classified under the following ICS (International Classification for Standards) categories: 81.040.20 - Glass in building. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO 11479-1:2011 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


INTERNATIONAL  ISO
STANDARD 11479-1
First edition
2011-10-01
Glass in building — Coated glass —
Part 1:
Physical defects
Verre dans la construction — Verre à couche — Partie 1: Défauts
physiques
Reference number
ISO 11479-1:2011(E)
©
ISO 2011
©  ISO 2011
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Terms and definitions . 1
2.1 Basic definitions . 1
2.2 Definition of physical defects . 2
3 Physical defects . 3
3.1 General . 3
3.2 Detection of defects . 3
3.3 Conditions of examination . 3
3.4 Punctual defects . 5
3.5 Acceptance criteria for coated glass defects . 6
Bibliography . 7
© ISO 2011 – All rights reserved  iii

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International
Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 11479-1 was prepared by Technical Committee ISO/TC 160,  Glass in building, Subcommittee SC 1,
Product considerations.
ISO 11479 consists of the following parts, under the general title Glass in building — Coated glass:
—  Part 1: Physical defects
—  Part 2: Colour of façade
iv © ISO 2011 – All rights reserved

INTERNATIONAL STANDARD ISO 11479-1:2011(E)
Glass in building — Coated glass —
Part 1:
Physical defects
1 Scope
This part of ISO 11479 specifies optical quality requirements for coatings applied to glass using either pyrolytic,
sol-gel or vacuum (sputtering) deposition methods for use in building glazing. More specifically, this part of
ISO 11479 relates to low-e and solar-control coated glass. This part of ISO 11479 is not applicable to patterned
or other optically distorting glass.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1 Basic definitions
2.1.1
method of deposition
method of adding a single or multilayer coating consisting of metal, oxide, nitride, fluoride or other compound
to the surface of the glass by vacuum (sputtering), sol-gel or pyrolytic deposition
2.1.2
coated glass
glass substrate to which a coating has been applied on one or both sides in order to modify one or more of
its properties
2.1.3
coating
one or more layers applied to the glass using either the pyrolytic, sol-gel or vacuum (sputtering) deposition method
2.1.4
finished size glass
flat glass sheet cut to the dimensions required for final fabrication or use
2.1.5
stock size glass
jumbo size glass
standard size of annealed flat glass sheet that may be cut down to a smaller finished size for fabrication
2.1.6
daylight illumination
uniform overcast sky, with or without direct sunlight
2.1.7
glass substrate
glass to which the coating is applied to either one or both sides
NOTE  Examples of glass substrates are: basic float glass (clear or body-tinted), thermally or chemically toughened
safety glass, thermally toughened borosilicate safety glass, heat-strengthened glass, heat-strengthened borosilicate
glass, laminated glass, laminated safety glass, alkaline earth silicate glass, or toughened alkaline earth silicate glass.
© ISO 2011 – All rights reserved  1

2.1.8
pyrolytic deposition
online coating
method of manufacture of a coating, whereby the coating is applied to hot glass, usually at the time of flat glass
manufacturing
2.1.9
sol-gel coating
offline coating
method of manufacture of a coating, whereby the coating is applied to flat glass on a wet coating line
2.1.10
vacuum deposition
offli
...

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