ASTM_C_1503_-_08_2013.pdf

Designation:C150308(Reapproved 2013)Standard Specification forSilvered Flat Glass Mirror1This standard is issued under the fixed designation C1503;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the requirements for silveredflat 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 ofsilvered annealed monolithic clear and tinted flat glass mirrorsup to 6 mm(14in.)thick.The mirrors are intended to be usedindoors for mirror glazing,for components of decorativeaccessories or for similar uses.1.3 This specification does not address safety glazing ma-terials nor requirements for mirror applications.Consult modelbuilding codes and other applicable standards for safetyglazing applications.1.4 Mirrors covered in this specification are not intended foruse in environments where high humidity or airborne corrosionpromoters,or both,are consistently present(such as swimmingpool areas,ocean-going vessels,chemical laboratories andother corrosive environments).1.5 The dimensional values stated in metric units are to beregarded as the standard.The inch-pound units given inparentheses are for information only.1.6 The following safety hazards caveat pertains only to thetest method portion Section 7 of this specification.Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory require-ments prior to use.2.Referenced Documents2.1 Reference to these documents shall be the latest issueunless otherwise specified by the authority applying thisspecification:2.2 ASTM Standards:2B117 Practice for Operating Salt Spray(Fog)ApparatusC162 Terminology of Glass and Glass ProductsC1036 Specification for Flat GlassE903 Test Method for Solar Absorptance,Reflectance,andTransmittance of Materials Using Integrating Spheres3.Terminology3.1 Definitions:3.1.1 Refer to Terminology C162 and the standards refer-enced in 2.2 as appropriate.3.1.2 associated distortion,nalteration of viewed imagescause by variations in glass flatness in inhomogeneous portionswithin the glass.3.1.3 blemishesimperfections in the body,on the surfaceor in the silver coating of the mirror;for the purpose of thisspecification blemishes are divided into 3 categories:3.1.3.1 linear blemishesscratches,rubs,digs,and othersimilar imperfections on either surface of the glass substrate.3.1.3.2 point blemishescrush,knots,dirt,stones,gaseousinclusions(seeds and bubbles),tin particles,and other similarimperfections in the body of the glass substrate.3.1.3.3 silver film blemishesvisible clouding,spot silverfaults and other similar imperfections of the silver coating.3.1.4 chipan imperfection on the edge of a mirror lite dueto breakage of a small fragment out of an otherwise regularsurface.3.1.4.1 shell chipa circular indentation in the mirror edgedue to breakage of a small fragment.3.1.4.2 v-chipa V-shaped chip indentation in the mirroredge due to breakage of a small fragment.3.1.4.3 chip widththe perpendicular distance from theedge of the mirror to the inner edge of the chip.3.1.4.4 chip lengththe distance,parallel to the edge of themirror,from one edge of a chip to the other.3.1.4.5 chip depththe measured distance of a chip fromthe face of the mirror into the thickness.1This specification is under the jurisdiction of ASTM Committee C14 on Glassand Glass Products and is the direct responsibility of Subcommittee C14.08 on FlatGlass.Current edition approved April 1,2013.Published April 2013.Originallyapproved in 2001.Last previous edition approved in 2008 as C150308.DOI:10.1520/C1503-08R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.5 clean cut edgenatural cut edge of mirror withoutfurther fabrication.3.1.6 clustera group of not less than 3 point blemishesseparated by not more than 50 mm(2 in.).3.1.7 crusha lightly pitted area in the glass surface result-ing in a dull gray or white appearance over the region.3.1.8 digdeep,short scratch in the glass surface.3.1.9 dirta small particle of foreign material imbedded inthe glass surface.3.1.10 edge corrosionchange in the color or level ofreflectance along the mirror edge as a result of degradation ofthe silver