1、 Reference number ISO 25537:2008(E) ISO 2008INTERNATIONAL STANDARD ISO 25537 First edition 2008-09-15 Glass in building Silvered, flat-glass mirror Verre dans la construction Miroir argent en verre plat ISO 25537:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with
2、 Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing po
3、licy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every
4、 care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified
5、, 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 ISOs member body in the country of the requester. ISO copyright office Case p
6、ostale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reservedISO 25537:2008(E) ISO 2008 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms
7、 and definitions .1 4 Materials .4 5 Dimensions 4 6 Reflectance of clear glass mirrors.4 7 Quality requirements.5 8 Testing of silvered mirror .7 Annex A (normative) Condensation-water test in a constant atmosphere.9 Annex B (normative) Dip test.12 ISO 25537:2008(E) iv ISO 2008 All rights reservedFo
8、reword 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 tec
9、hnical 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 o
10、f 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
11、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 fo
12、r identifying any or all such patent rights. ISO 25537 was prepared by Technical Committee ISO/TC 160, Glass in building, Subcommittee SC 1, Product considerations. ISO 25537:2008(E) ISO 2008 All rights reserved vIntroduction This International Standard specifies tests procedures for assessing the d
13、urability of a mirror by measuring its ability to resist corrosion, and adhesion of its protective paints. Two of the tests prescribed are defined in other International Standards: ISO 9227 and ISO 2409. Two additional tests, a water-condensation test and a dip test, are also prescribed and the proc
14、edure for carrying them out is described in annexes. This International Standard also specifies the minimum requirements regarding reflectance as well as reflective silver-coating faults, edge faults and protective-coating faults, and optical quality. The quality of a silvered mirror can be affected
15、 by faults that alter the appearance of the image of reflected objects. Such alteration of the image can result from optical faults, faults in the glass and faults in the reflective coating. INTERNATIONAL STANDARD ISO 25537:2008(E) ISO 2008 All rights reserved 1Glass in building Silvered, flat-glass
16、 mirror SAFETY PRECAUTIONS This International 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 International Standard to establish appropriate safety and health practices and to determine the applicability
17、of regulatory requirements prior to use. 1 Scope This International Standard specifies the minimum quality requirements (regarding optical, visual and edge faults) and durability tests for silvered float glass for internal use in buildings. This International Standard applies only to mirrors from si
18、lvered glass manufactured from flat, annealed clear or tinted float glass, from 2 mm to 6 mm thick, and supplied in stock/standard sizes and as-cut finished sizes to which no further processing (such as edgework or other fabrication) has been done. NOTE Upon consultation with the mirror manufacturer
19、, it is possible to apply this International Standard to float glass having a thickness less than 2 mm or greater than 6 mm. This specification covers the quality requirements of silvered, annealed, monolithic, clear and tinted flat glass mirrors. Mirrors covered in this specification are not intend
20、ed for use in environments, e.g. horse-riding halls, swimming pools, medical baths, saunas, swimming pool areas, chemical laboratories and other corrosive environments, where high humidity or airborne corrosion promoters, or both, are consistently present. This International Standard is not applicab
21、le to reflective glass for external glazing applications. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (inc
22、luding any amendments) applies. ISO 2409:2007, Paints and varnishes Cross-cut test ISO 9227:2006, Corrosion tests in artificial atmospheres Salt spray tests ISO 9050, Glass in building Determination of light transmittance, solar direct transmittance, total solar energy transmittance, ultraviolet tra
23、nsmittance, and related glazing factors 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 fault blemish US imperfection in the body or on the surface of the mirror ISO 25537:2008(E) 2 ISO 2008 All rights reserved3.2 linear fault scratch, hairli
24、ne scratch, rub, dig, extended spot fault and other similar imperfections 3.3 spot fault halo, colour spot, dirt, pinhole, stone, gaseous inclusion (seed or bubble), tin particle, deposit and other similar imperfection 3.4 centre zone central part of a mirror defined by 80 % of the length and 80 % o
25、f the width dimensions 3.5 chip imperfection on the edge of a mirror due to breakage of a small fragment out of an otherwise-regular surface 3.6 cloud frosted appearance in the reflected image from a silvered mirror 3.7 cluster group of not fewer than three spot faults separated by not more than 50
26、mm 3.8 colour spot alteration of the reflective coating in the form of a small, generally coloured spot 3.9 dig deep, short scratch in the glass surface 3.10 dirt small particle of foreign material imbedded in the glass surface 3.11 edge corrosion change in the colour or level of reflectance along t
27、he mirror edge as a result of degradation of the silver coating from external sources 3.12 edge fault fault that affects the as-cut edge of the silvered glass NOTE Edge faults can include entrant/emergent faults, shelling, corners on/off, vents (small cracks), chips, shell chips, and flare. 3.13 edg
28、ework fabrication of the mirror edge beyond the original clean-cut condition 3.14 flare protrusion on the edge of a piece of mirror ISO 25537:2008(E) ISO 2008 All rights reserved 33.15 gaseous inclusion seed bubble round or elongated bubble at the surface (open) or within the body thickness leaving
29、a cavity in the mirror 3.16 hairline scratch very fine, circular scratch that can barely be seen that is associated with glass-cleaning techniques 3.17 halo distortion zone around a spot fault 3.18 silvered mirror flat, annealed, clear or tinted float glass, the rear surface of which has been coated
30、 with a protected reflective silver layer 3.19 mirror cut size mirror cut to a stock/standard size that is intended for final use in the size ordered (i.e. mirror not intended for re-cutting) NOTE These mirrors can be subject to further processing, e.g. edge working, drilling, face decoration, etc.
31、3.20 mirror stock size mirror intended for architectural use supplied with as-cut edges, where trimming is required 3.21 optical fault fault directly associated with the distortion of the reflected image 3.22 protective coating(s) fault pinhole, burst bubble, scratches or loss of adhesion of the pro
32、tective coating(s) and other types of faults in the protective coating(s) where the metallic layer is exposed 3.23 reflective silver-coating fault fault in the reflective silver layer, altering the appearance of the silvered glass, e.g. scratches, colour spots and edge deterioration and corrosion 3.
33、24 rub abrasion of the mirror surface producing a frosted appearance 3.25 scratch damage on the glass surface in the form of a line caused by the movement of an object in contact with the glass surface relative to the surface 3.26 shell chip circular indentation in the mirror edge due to breakage of
34、 a small fragment ISO 25537:2008(E) 4 ISO 2008 All rights reserved3.27 silver coating metallic silver layer in a silvered mirror product 3.28 stain alteration of the reflective coating characterized by a more or less brownish, yellowish or greyish colouration of zones NOTE Stains can sometimes cover
35、 the whole reflective surface. 3.29 stone crystalline inclusion in the mirror 4 Materials 4.1 Glass products Silvered, flat-glass mirror shall be manufactured from monolithic float glass. In the absence of an appropriate International Standard for float glass products, and until such an Internationa
36、l Standard is published, the float glass used shall conform to the appropriate national standards. 4.2 Reflective coating The mirror shall be manufactured with a reflective coating made of silver. 4.3 Protective coating(s) The reflective coating described in 4.2 shall be protected by one or more lay
37、ers and/or protective coatings e.g. paint, lacquer, etc. 5 Dimensions The dimensional tolerances for thickness, length, width and squareness of the mirrors shall be those applicable to float glass. 6 Reflectance of clear glass mirrors Measurement of reflectance shall be undertaken in accordance with
38、 ISO 9050 with an angle of incidence of the light within 8 of normal. For the calculation of the reflectance, illuminant D65 and a 2 observer shall be used. When measured in accordance with ISO 9050, the minimum visible-light reflectance of silvered mirrors made of clear glass shall be at least 83 %
39、. The reflectance of mirrors made from tinted glass, when measured in accordance with ISO 9050, may be below 83 %. ISO 25537:2008(E) ISO 2008 All rights reserved 57 Quality requirements 7.1 Quality assessment and inspection methods for silvered mirrors 7.1.1 Glass, reflective coating, edge and prote
40、ctive coating quality 7.1.1.1 Inspection method The silvered mirror shall be observed in a vertical position, with the naked eye and under normal diffused daylight conditions, (between 100 lx and 1 000 lx at the silvered mirror), from a distance of 1 000 mm. The direction of observation shall be nor
41、mal, i.e. at right angles, to the silvered mirror. The use of an additional lighting source, e.g. spotlight, shall not be allowed. 7.1.1.2 Glass faults Glass faults shall be assessed in accordance with the method described in 7.1.1.1. The dimensions and number of spot faults and linear faults that c
42、ause disturbance to the image shall be noted. 7.1.1.3 Reflective silver coating faults Reflective silver-coating faults shall be assessed in accordance with the method described in 7.1.1.1. The dimensions and number of spot faults and linear faults that cause disturbance to the image shall be noted.
43、 7.1.1.4 Protective coating(s) faults The presence of protective coating(s) faults shall be assessed in accordance with the method described in 7.1.1.1 looking at the protective-coated side (backside) of the mirror. 7.1.1.5 Edge faults The presence of edge faults shall be assessed in accordance with
44、 the method described in 7.1.1.1. The dimensions of the chips, shell chips and flares shall be measured. The depth shall be the measured distance of a fault from the face of the mirror into the thickness. The length shall be the distance, parallel to the edge of the mirror, from one edge of a fault
45、to the other. The width shall be the perpendicular distance from the edge of the mirror to the inner edge of the fault. 7.1.1.6 Cloud and stain The presence of cloud and stain shall be assessed in accordance with the method described in 7.1.1.1. 7.1.2 Qualitative visual inspection method of the opti
46、cal quality A silvered mirror shall be examined in areas of 500 mm 500 mm at a time. The observer shall be located at a distance of 2 000 mm in front of and normal to the area being examined. Behind the observer shall be an irregular background. The reflected image shall not be optically disturbed,
47、e.g. by another reflective surface, window, etc. 7.2 Acceptance levels 7.2.1 Glass faults Acceptance level for glass faults shall be as given in Table 1. 7.2.2 Reflective silver-coating faults Acceptance level for reflective silver-coating faults shall be as given in Table 1. ISO 25537:2008(E) 6 ISO
48、 2008 All rights reserved7.2.3 Protective coating(s) faults Acceptance level for protective coating(s) faults shall be as given in Table 1. Table 1 Acceptance levels for glass faults, reflective silver-coating faults and protective coating(s) faults Fault Number of faults per square metre Cut size a
49、Type Size mm Stock size aCentre zone Edge zone 75 None None aThe number of faults is rounded to the first decimal using the standard rule. 7.2.4 Edge faults Acceptance level for edge faults shall be as given in Table 2. Table 2 Requirements for edge faults Edge faults (viewed from front) Stock size mm Cut size mm Type Location Chips, shell chips length u 10 3,2 width u 10 1,6 depth u 6 1,5 Flare length u 10 3,2 width u 10 1,6 depth u 6 1,5 Corners on/off Unrestricted Allowed if less than 25 % of glass thickness Key 1 chips
