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lndian StandardIS 2653 f Pa rt 1 ) : 1990

SAFETY GLASS - SPECIFICATIONPART 1 GENERAL PURPOSE

( Third Revision )First Reprint AUGUST 1991

UDC 666.155

@ BIS 1990BUREAU OF INDI AN STANDARDS

( Reaffirmed 1995 )

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Glassware Sectional Committee; CDC 10

FOREWORDThis Indian Standard ( Part 1 ) ( Third Revision ) was adopted by the Bureau of Indian Standards on15 April 1990, after the draft finalized by the Glassware Sectional Committee had been approved bythe Chemical Division Council.This standard was adopted I%om BS 857: 1954 Specification for safety glass for land transport in 1963and was published as IS 2553: 1964 ( rerisetl ). During the second revision in 1971, optical requirementswere added and nominal thickness and tolerance were modified in accordance with IS 2835 : 1977Specification for flat transparent sheet glass ( second revision ). TO cater to the needs of the presentland transport and of architectural and other uses, and subsequent to the revision of IS : 2835, thecommittee decided to further revise this standard in two parts :and Part 2 dealing with safety glass for land transport. Part 1 dealing with general purposes,111 his revision ( Part 1 ) the use of float glass 112s been permitted.toughened glasses have been included.

Warp and resistance to shock fortest has been modified. To make the boil test more stringent, the sampling plan for theSpectrophotometric method has been introduced as an alternative method tothe use of ,CIE Standard lllumination (A) for measuring visual transmission. Quartz glass mercurylamp of 750 f 50 watt has been prescribed in place of Hanovia S 500 lamp as a source of ultra violetradiation in the light stability test. The procedure for fragmentation test has been modified. Theuniformity test has been deleted as the quality of toughening is being tested in the subsequent fragmenta-tion test and the points of impact have been marked in the fragmentation test. The nominal thicknessof the laminated safety glass has been rationalized taking in view the thickness of the foil and the tolerancein the nominal thickness of the sheet glass. Dimensional tolerances on cut sizes ( length and width )have been specified for both toughened and laminated safety glass. Marking clause has been modified.Sampling plan has also been modified.Part 2 of this standard ( under prcparatioI1.) will cover the requirements for the satety glass for landtransport. Till such t!me_as Part 2 is published, the requirements as laid down in this standard along withthe terminology and optical requirements as covered in 2 and 4.4 of IS 2553 : 1971 Specification forsafety glass ( seror~tl revision ) shall bc applicable for the safety glass including wind screen for landtransport.In preparing this standard aasistancc ha> been dcrivcd from :

a) JIS 3205 : 1983 Laminated glasses issued by Japanese industrial Standard.b) JIS 3206 : 1983 Tempered glasses issued by Japanese Industrial Standard.c) BS 857 : 1967 Safety glass for land transport issued by British Standards Institution.

For the purpose of deciding whether a particular requirement of this standard is complied with, thefinal value, observed or calculated, expressing the result of a test or analysis, shall be rounded off inaccordance with IS 2 : 1960 Rules for rounding off numerical values (revised). The number ofsignificant places retained in the rounded otf value should be the same as that of the specified value inthis standard.

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IS 2553 ( Part 1 : 1990

Indian StandardSAFETY GLASS-SPECIFICATION

PART 1 GENERAL PURPOSE

( Third Rev ision )1 SCOPEThis standard ( Part 1 ) prescribes the requirementsand the methods of sampling and test for safetyglass meant for general purposes such as for usein glazing windows, doors of buildings and rail-way coaches.i REFERENCES

IS No. Title1382 : 198 1 Glossary of terms relating to glassand glassware (jirsr revision)2835 : 1987 Specification for flat transparentsheet glass (third revision)3 TERMINOLOGY3.1 For the purpose of this standard, the defini-tions given in IS 1382 : 1981, in addition to thefollowing shall apply.3.1.1 Toughened Safety GlassA singlek piece of specially heat treated or chemi-cally tr ated glass, with a stress pattern such thatthe piece when fractured reduces to numerousgranular fragments, with no large jagged edges.3.1.2 Laminated safety GlassTwo or more pieces of glass held together by aninterleaving layer or layers of plastic materials.The laminated safety glass will crack and breakunder sufficient impact, but the pieces of glasstend to adhere to the plastic and do not fly. If ahole is produced, the edges are likely to be lessjagged than would be the case with ordinaryglass.3.1.3 Central Area and Outer AreaArea enclosed by an elipse or circle whose majoror minor axes or diameter do not exceed l/2 oflength or width of the Safety Glass is consideredas central area. The remaining area is consi-&red as outer area.4 TYPESSafety glass shall be of four types as follows:

a) Toughened Safety ( tempered ) Glass (TS ),

b) Toughened-Float Safety Glass ( TF ),c) Laminated Safety Glass ( LS ), andd) Laminated Float Safety Glass ( LF ).

5 REQUIREMENTS5.1 General5.1.1 MaterialSafety glass shall be made ofAA and A quality[ see IS 2835glass. : 1987 ] from flat transparent

NOTE - Safetyglass may also be made from float glass,if agreed to between the manufacturer and the purchaser.5.1.1.1 Safety glass may be flat or curved andtinted/coloured itself or by providing colouredinterlayer( as agreed to between the manu-facturer and the purchaser.5.1.2 Measurement of ThicknessThe thickness of safety glass shall be measuredin accordance with: the method prescribed in 5.1and Annex B of IS 2835 : 1987.5.13 Distribution of Allowable DefectsSafety glass made from AA or A quality sheetglass shall not have defects greater than thosespecified for AA or A quality of sheet glass as thecase may be in Table 2 of IS 2835 : 1987.

NOTE- Safety glass made from float glass shall nothave waviness more than 8 mm (refer IS 2835 : 1987.teat for waviness) both in central and outer area andfor other defects it shall not have more than thosespecified for AA quality of sheet glass of IS 2835 : 1987.5.1.3.1 Allowable cluster of defects5.1.3.2 Toughened safety glass made from AA orA quality sheet glass shall not have cluster ofdefects more than those specified for AA or Aquality of sheet glass as the case may be inTable 2A of IS 2835 :. 1987.

NOTE-Toughened safety glass ma& from float glassshall not have cluster of defects more than those specifiedfor AA quality sheet glass in Table 2A of IS 2835: 1987.1

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IS 2553 Part 1 ) : 19905.1.3.3 As the laminated safety glass containstwo pieces or more of sheet glass, cluster of defectsin the product made from AA or A quality ofsheet glass or float glass as the case may be, shallbe as agreed to between the purchaser and themanufacturer.5.2 Requirements Specific. to Toughened SafetyGlass5.2.1 ThicknrssToughened saftiy glass shall be of nominal thick-ness and range of thickness as specified in Table 1of IS 2835 : 1987.5.2.2 Dimrnsional T~leratrees OII Cut Size (Lengthand Width)Tolerance on length and width of the toughenedsafety glass shall be in accordance with Table 1of IS 2835 : 1987.5.2.3 Fragmen tntion TestIt shall pass the fragmentation test as prescribedin Annex A.5.2.4 WarpIt shall not exceed 0.5 percent for arc and 0.3percent for wave pattern for flat glasses. It shallbe measured by erecting the test specimen verti-cally and attaching a ruler there horizontally.The warp shall be indicated by the percent ratioof the height of arc to the&ngth of chord for archpattern and by the percent ratio of the heightfrom bottom to top of the wave, to the distancefrom top to top ( or from bottom to bottom )for wavy pattern. This test is meant for flat safetyglass only.5.2.5 Resistance to Shock TestIt shall pass the test for resistance to shock asprescribed in Annex B. I_

NOTE? - This test shall apply to the toughened safetyglasses having a thickness of 5.0 mm and above. Forglasses having a thickness of less than 5.0 mm, adoptionof the test and interprefation of the results shall be asagreed to between the purchaser and the manufacturer.5.3 Requirement Specific to Laminated SafetyGlass5.3.1 ThicknessLaminated safety glass shall be of thickness asspecified in Table 1.5.3.1.1 If agreed between the purchaser and thesupplier, nominal thickness of laminated safetyglass, other than those specified in Table 1 mayalso be supplied. In such cases the range of thick-ness shall be those which are applicable to imme-diately lower thickness as specified in Table 1.

53.2 Clrt Si:rsFor matching the edgs of laminates in laminatedsafety glass, the tolerance limit within \vhichoverlapping of Edges shall be maintained shallnot exceed 51.5 mm, but overall dimensionaltoIerance on the cut sizes ( length and width )shall be subjected to the limit \pecjficd in col 4of Table I.5.3.3 Light Stability+ TestLaminated safety glass shall pass the requirementsof light stability test as prescribed in Annex C.Table 1 Nominal Thickness, Range of Thickness,Dimensional Tolerance on Length andWidth of Laminated Safety Glass

( (Inuses 5.3.1, 5.3.1.1 rnicl 5.3.2)

EO.Seminal Range of DimensionalThickness Thickness Tolerance onCut Sizet Length and Width )(1) (2) (3) (4)

mm mm n11ni) 3.5 3.1 to 3.7 2.5

ii) 4.0 4.0 to 4.8 2.5iii) 5.0 5.0 to 5.8 2.5iv) 6.0 6.0 to 6.8 2.5v) 8.0 8.0 to 8.8 3.0

vi) JO.0 9.8 to 11.0 3.5

5.3.4 Boil TestLaminated safety glass shall pass the require-ments of boil test as prescribed in Annex D.5.3.5 Fracture crud Adhesiw TestLaminated safety glass shall pass the requirementsof fracture and adhesion test as prescribed inAnnex E.6 PACKING AND MARKING6.1 PackingSafety glass shall be packed as agreed to betweenthe manufacturer and the purchaser.6.1.1 The packet shall be marked with the followinginformation:

Indication of the source of manufacture,Nominal thickness of glass,Code or batch number,Month and year of manufacture, andType of glass.

2

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6.2 MarkingEach piece of safety glass shall be marked indeliblyand distinctly with the following information:

a) In the case of toughened safety glass, itshall be marked either with the letter. TSAfor toughened sheet of A quality or TSAAfor toughened sheet of AA quality or TFfor toughened float quality;

IS 2553 ( Part 1 ) : 1!BOb) In the case of laminated safety glass, itshall be marked either with the letter LSAfor laminated sheet of A quality or LSAAfor laminated sheet of AA quality or LFfor laminated float quality; andc) Indication of the source of manufacture.

7 SAMPLING7.1 Representative samples of the material shallbe drawn as prescribed in Annex F.

ANNEX A( Clause 5.2.3 )

FRAGMENTATION TESTA-O PRINCIPLEToughened glass is broken by giving itpunch and number of broken particlesarea are counted.A-l PROCEDUREA-l.1 Three glasses from each lot having

a suddenper unit

the samethickness are to be tested for this purpose. Thespecimen shall be supported as far as possibleover its whole area, means being provided to pre-vent any substantial spreading of the fragments( see Note ). The three glasses shall be brokenby means of a centre punch of 0.2 f O-05 mmIn radius of curvature at its tip by giving a severeblow to cause fracture, the points of impactshall be as specified in Fig. 1.

NOTES1 In case glass has tong mark, either of the points 1and 3 of Fig. 1 shall be on the tong mark side.2 In case of a flat glass, the specimen may belaid on any convenient hat surface and spreading of theparticles prevented by a loose wooden frame. In thecase of curved glass, the specimen may be wrapped ina sheet of paper, and sealed in such a manner that thepackage may be readily opened from one side andplaced for breaking on a suitable supporting frame.

b

C 20mmIc I

POINT I II20mm

POtNT 111FIG. I POMTS OF IMPACT FOR FRAGMENTATION ESTA-l.2 The particle count determination on anyone piece of glass sheet shall be completed within3 minutes of the fracture of that glass. No magni-fying dense or other aid to vision (except spectacles

if normally worn ) shall be used when making theparticle count as described below.A-l.3 When broken as described above, the parti-cles in a square of side 5 cm shall be counted. Afragment on the side line of the square, shall becounted as half. The particle count shall be madein the region of coarsest fracture excluding theareas, within 20 mm from the periphery of the glassand within 75 mm in radius from the point ofImpact.A-2 INTERPRETATION OF RESULTSA-2.1 Glasses up to 4.0 mm ThicknessThe material shall be taken as having satisfiedthe requirement of the test if:a>b)

there are not more than 400 and not lessthan 40 particles in a square of side 5 cmin the coarsest area as defined in A.1.3; andif the count is between the limits of lessthan 40 but not less than 30 per 25 cma,the count in the embracing square of side10 cm shall be not less than 160 particles.

A-2.2 Glasses Above 4-O mm ThicknessThe material shall be taken as having satisfiedthe requirement of the test if:

a) there are not more than 400 particles andnot less than 60 particles in a square of side5 cm in the coarsest area as defined inA-1.3; andb) if the count is between-the limits of lessthan 60 but not less than 40 per 25 cm*,the count in the embracing square of side10 cm is not less than 240 particles.

A-2.2.1 If the fragmentation of any glass provesto be unsatisfactory, three additional glassesshall be taken from the lot, and thestest repeated.3

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IS 2553 ( Pa r t 1 ) : 1990ANNEX B( lause 5.2.5 )

RESISTANCE TO SHOCK TEST

so P R~ CI P L EThe toughened safety glass is given a suddenshock with a smooth surface steel ball of63.5 mm in diameter from a height of 100 cm.B-l APPARATUSB-l.1 A steel ball of about 63.5. mm in diameterand weighing *I 040 & 2 g with smooth surface.El.2 Test SpecimenThe test specimens for use in this test shall betempered glasses of flat or near flat of about 610x

610 mm square having the same thickness manu-factured by a method similar to the method forthe product.B-l.3 Testing FrameThe test specimen shall be supported with an ironframe of the type shown in Fig. 2 so that it becomeshorizontal. An auxiliary frame may be used forcurved glasses, if necessary.B-l.4 A means for dropping the ball freely froma height of 100 cm so as to strike the specimenwithin 25 mm from its centre is required. An

r ____w_ _ _________ II II III IIII I: II II II II: II III, III_ ____ ,,,,,,,, ---4

e 4

L 61 0

RUBBER SHEETOmm. fhk.All dime nsions in millimctres.

F:G. 2 FRAME! FOR RESIVANCE,TO SHOCK TEST4

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1s 2553 ( Part 1 ) : 1990electro-magnet may conveniently be used for this shall be limited to one time and the test shall bepurpose. carried out at ordinary temperature.B-2 PROCEDUREB-2.1 Place the test specimen on testing frame. Thesteel ball is placed at a height of 100 cm from thesurface, allowed to fall towards the centre of thesurface of the test specimen from standstill statewithout any force applied. The presence ofbreaking is observed.B-2.2 The number of impact per test specimen

B-2.3 Five specimens are to be tested for this test.NOTE - For toughened safety glasses made of figuredPlasses as material, the impact surface shall be the SW-ace having no pattern.

B-3 INTERPRETATION OF RESULTSThe product shall be accepted when not more thanone sheet is broken and rejected when 3 or moresheets of them are broken. When 2 sheets arebroken, another sample of 5 sheets shall be testedand the lot accepted if all the 5 sheets pass the test.

ANNEX C( Clcmse5.3.3LIGHT STABILITY TEST

C-O GENERALThe purpose of this test is to ensure that laminatedsafety glass is resistant to the effects of exposureto light encountered in service.C-l APPARATUSC-l.1 A Source of Ultra Violet RadiationsA radiation source consisting of a medium pressuremercury vapour arc lamp with a tubular quartzbulb of ozone-free type; the bulb axis shall bevertical. The nominal dimensions of the lampshall be 360 I~JIIin length and 9.5 mm in diameter.The arc length shall be 300 5 14 mm. The lampshall be operated at 750 + 50 W. A-ny othersource of radiation which produces the same effectas the lamp specified above may be used. TOensure that the effects of another source are thesame, a comparison shall be made by measuringthe amount of energy emitted within a wavelengthrange of 300 nm to 400 nm, all other wavelength4being removed by the use of suitable filters.C-l.2 Visual Transmission ApparatusC-1.2.1 C/E St andard JIlum inar~t A)A gas filled incandescent lamp with colour tempe-rature of 2 854 5: 50K is suitable.C-1.2.2 Alt etw atr IO CrE St andard JIluminant (A)Spectrophotometer covering the \\avelength from380 to 770 nm.

C-1.2.3 Equipment for M eaawing Visual Trans-missionC-1.2.3.1 _ isual tran.w~i.s.~ionmeasurement using.standarr! :linantMeasure transmitted light beam and theincident iig!:, beam of the specimen. Express theratio of the two values in percent, and take it asthe visibi 5; ht transmission.C-1.2.3.2 biswl trm~sm ission measur~~mc~~t sing.~pectro~~holon7etetMeasure the light transmission of the specimencovering the wavelength from 380 to 770 nm atan interval of 10 nm using a suitable spectro-photomtter and express the value of tristimulus Yin percent under the standard jllumjnant (A)which shall be taken as the visible light transmis-sion. Value for Y under standard illuminant (A)is to be calculated as follows:

Y- C PAT&where

r~ = spectral transmission of glass at eachwavelength.PA = spectral energy distribution of the incidentlight at each wavelength.@, 7. distribution co-efficient defined by CIE.

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IS 2553 ( Part 1 ) : 1990The standard value of PA FA at each wavelengthfrom 380 to 770 nm at an interval of 10 nm understandard illuminant (A) is given below. Thelight transmission is the ratio of Y tristimulus ofthe light transmitted by the glass and that of theilluminant alone,

Light transmission - z T,. P1 FAPA FAWavclengtliin nm

380390400410420430440450460470480490500510520530540550560570

Standard ValueOfPA jQ underStandardnluminated A

0.000 00.000 10,000 50.001 90.008 00.026 50.060 90.116 7O-209 80.362 40.619 81.039 3l-795 63.084 94.761 46.323 07.598 58.570 79.220 19.457 4

Wavelengthin nm

580590600610620630640650660670680690700710720730740750760770

Standard valuePit2w.&er

Illuminated A9,225 78.543 07.546 06.359 95.064 93.712 22.558 71.638 90.970 60.532 70.289 60.146 70.074 40.039 80.019 50.010 00*006 20.002 10.001 1o.ooo 0

C-2 PROCEDURETake three specimens measuring 300 x 300 mm(see C-2.1) and determine their visual transmission.

Next place the specimens at a distance of 23 cmfrom the source of ultra violet radiation. Exposethe specimens to ultra violet radiation for a periodof 100 hours, maintaining a temperature between38C and 49C throughout the test. After theexposure again test the irradiated specimen, forvisual transmission as before.

NOTE-All the three irradiated specimens shall beretained for boil test.C-2.1 Interpretation of ResultsC-2.1.1 The specimens shall be considered to havepassed the requirements of the test if the followingcriteria are satisfied:

4

4

After the irradiation remarkable discoloura-tion (judged against a white background ),blister and turbidity detrimental to serviceshall not appear.After irradiation, reduction ratio of trans-mission for colourless laminated safetyglass should be not more than 10 percentof the original transmission.

NOTE - For laminated safety glass using tinted foilthe transmission after irradiation may be higher 0;lower than original transmission by 10 percent.The reduction ratio (I) shall be calculated fromthe following formula :Reduction ratio (I), percent = G xl00

wherea = transmittance (visible) before UV irradia-tion, andb = transmittance (visible) after UV irradiation.

ANNEX D( CZause 5.3.4)

BOIL TESTD-l PROCEDURE D-2 INTERPRETATION OF THE RESULTSImmerse all the three irradiated specimens(see C-2 Note) from light stability test, verticallyon the edge first in water at 65 & 2C for threeminutes and then immediately in boiling waterfor two hours and then removed.

NOTE-The specimens shall be kept in the vessel ofboiling water in such a way as not to touch the bottom NOTE-Any specimen m which the glass cracks tosuch an extent as to confuse the results, shall be dis-of the testing vessel directly. A suitable arrangement carded without prejudice and the test repeated onmay be used. another specimen after irradiation.

Upon immersing the specimens in boiling water fortwo hours, the glass itself may crack but neitherbubbles nor any other defects shall be foundwithin 15 mm from the edges or beyond 10 mmfrom the cracks. When the specimens have beenfrom bigger pieces, 25 mm from the new edgewill be checked.

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IS 2553 ( Part 1 ) : 1990ANNEX E

( Clause 5.3.5 )FRACTURE AND ADHESI ON TEST

E-O PRINCIPLEThe laminated safety glass is given a sudden punchand fragments from the under surface are collectedand weighed.E-l APPARATUSE-l.1 A hardened steel ball with a diameter of38 mm and weighing about 225 g shall be usedfor the test.E-l.2 A square hard wood frame having dimen-sions approximating to those shown in Fig. 3 soconstructed that when the test specimen restssymmetrically on the frame, 290 x 290 mm ofthe specimen shall remain unsupported. Theframe shall be rigidly mounted on 12 mm steelplate, the screws or bolts used for attaching it tothe steel plate shall not project below the under-surface of the plate. The complete frame shallstand upon a substantial concrete bed.

All dimensions in millimetres.F IG. 3 FRAME FOR FRACTURE AND ADHESION TEST

E-l.3 A means for dropping the ball freely froma height of 488 m so as to strike the specimenwithin 25 mm from its centre. An electro-magnetmay conveniently be used for this purpose.E-2 PROCEDUREE-2.1 Ten specimens of 300 x 300 mm (see 7)shall be tested. Prior to test, each specimenshall be weighed. Keep the specimen at 27 f 2Cfor 4 hours immediately preceding the test.Each specimen in turn shall be supported on thewooden frame in such a way that the plane of thetest specimen when in the frame shall be substan-tially horizontal. The ball shall be dropped asstipulated in D-1.3. The fragments from theundersurface of each specimen shall be separatelycollected and weighed,E-2.2 If out of 10 specimens so tested, the numberof specimens shown to be pierced in the test doesnot exceed four of which not more than two arebrittle, and if the total of the fragments fromunder side of the unpierced specimens does notexceed 0.5 percent of the total weight of theseunpierced specimens, and if no unpierced specimenyield, any fragment which individually weighsmore than 0.5 g, the consignment shall be deemedto have passed the test.

NOTE-The specimen will bc d e e m e d t o h a v e beenpierced if the split or tear exceeding 38 mm in lengthdevelops in the interlayer. A pierced specimen shall bedeemed to be brittle if it breaks into two or more largepieces or if the fracture is sufficient to allow the ballto pass through.

ANNEX F( Clause 7.1 )

SAMPLING OF SAFETY GLASSF-l TOUGHENED SAFETY GLASSF-l.1 All the toughened safety glasses of the samenominal thickness and substantially equal in sizeor similar in shape shall be grouped together andconstitute a lot. Sample shall be tested from eachlot to determine its conformity to the requirementsof thiq specification.F-l.2 Five percent, but not less than five toughenedsafety glasses shall be selected at random fromeach lot.

F-l.3 Each of the glasses selected under F-l.2shall be inspected for dimensional tolerance( 5.2.2 ) thickness (see 5.2.1 ), distribution ofallowable defects ( see 51.3 ), allowable clusterof defects (see 5.1.3.1 ) and warp ( .scc 5.2.4 )resistance to stock test (see 5.2.5 ) and shallsatisfy these requirements individually.F-l.4 Three glasses from each lot ( as selectedunder F-l.2 ) shall be tested for fragmentation( see 5.2.3 ). No failure shall occur in any of thethree test samples if the lot is to be accepted.7

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IS 2553 ( Part 1) : 1990F-2 LAMI NATED SAFETY GLASSF-2.1 For all the laminated safety glasses ofsame nominal thickness manufactured bysame method under similar conditions, twoshall be constituted as follows:

Lot (1) : Up to area 0.66 sqm

thethelots

NOTE- No one single lot would be bigger than500 sqm Bigger lots would be divided in lots of500 sqrn (and part thereof).F-2.3 Each of the pieces as selected in F-2.2 shallbe inspected for dimensional tolerance (5.22 )thickness (see 5.3.1 ), distribution of allowabledefects (see 5.1.3 ) and allowable cluster of defects( see 5.1.3.1 ) and shall satisfy the requirementsindividually.

Lot (2) : Above area 066 sqm F-2.4 Three out of thirteen specimens ( see F-2.2 )F-2.2 Draw by random selection, minimum from each lot shall be inspected for light stabilitynumber of sheets from each lot, separately, so that test ( see 5.3.3 ) and boil test (see 5.3.4 and C-Zthirteen samples of 300 X 300 mm may be taken Note ) and ten specimens shall undergo fractureout. Mark the glasses (1) and (2) to identify the and adhesion test (see 5.3.5). No failure shall occurlots. in any of the thirteen test samples if the lot isto be accepted.

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I I/ Standard Mark IThe use of the Standard Mark is governed by the provisions of the Bureau of Indian StandardsAct, 1986 and the Rules and Regulations made thereunder. The Standard Mark on productscovered by an Indian Standard conveys the assurance that they have been produced to complywith the requirements of that standard under a well defined system of inspection, testing andquality control which is devised and supervised by BIS and operated by the producer. Standardmarked products are also continuously checked by BIS for conformity to that standard as afurther safeguard. Details of conditions under which a licence for the use of the Standard Markmay be granted to manufacturers oc producers may be obtained from the Bureau ofIndian Standards.

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BIS is a statutory institution established under the Bureau of Indian Srandards Act, 1956 to promoteharmonious development of the activities of standardization, marking and quality certification of goodsand attending to connected matters in the country.

BIS has the copyright of all its publications. No part of these publications may be reproduced inany form without the Prior permission in writing of BIS. This does not precltie the free use, in thecourse of implementing the standard, of necessary details, such as symbols and sizes, type or gradedesignations. Enquiries relating to copyright be addressed to the Director ( Publications ), BIS.Rcvlsiin of Indiao Standar dsIndian Standards are reviewed periodically and revised, when necessary and amendments, if any, areissued from time to time. Users of Indian Standards should ascertain that they are in possession ofthe latest amendments or edition.following reference : Comments on this Indian Standard may be sent to BTS giving the,Dot : No. CDC 10 (9116)

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

Headquarters :BUKEAU OF INDIAN STANDARDS

Manal: Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002Telephones : 331 01 31, 331 13 7sRegional Ofliices ;Central : Manak Bhavan, 9 Cahadur Shah Zafar Marl:NEW DEL111 110001Eastern : I/14 C.!.T. Scheme VII M, V.I.P. Road, Maniklola.CALCIJTTA 700054

Telegrams : Manaksanstha(Common to all Ohices)

Telephone

{331 01 31

-331 13 7537 86 62

Northern : SC0 445-446, Sector 35-C CHANDIGARH 160036Southern : C.I:T. Campus, IV Cross Koad, MADRAS 600113Western : Manakalaya, E9 MIDC, Marol, Andheri ( East 1BOMBAY 400093

2 18 4341 29 16

6 32 92 95Branches : AHMADABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE.FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR.KANPUR. PATNA. TRIVANDRUM.

Reprography Unit, BIS, New Delhi, India

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AMENDMENT NO. 1 JANUARY 1993TO

IS 2553 ( Part 1) : 1990 SAFETY GLASS -SPECIFICATION

PART 1 GENERAL PURPOSE(ThirdRevision)

(Page 5, clause C-l.1 ) - Insert the following Note at the end:-A Hanovia S-500 lamp suits the above specificaitons.

Reprography Unit, BIS, New Delhi, India

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AMENDMENT NO. 2 JUNE 2001TO

IS 2553( PART 1 ) :1990 SAFETY GLASS SPECIFICATION

PART 1 GENERAL PURPOSE( Third Revision)

(Page 6, clause D-2, hke 4 ) Substitute beyond for within.(Page 7, clause E-2.1, line 9 ) Substitute E-1.3 for D-1.3.

( CHD 10 )Reprography Unit, BIS, New Delhi, India

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AMENDMENT NO. 3 MARCH 2003TO

IS 2553( Part 1 ) :1990 SAFETY GLASS SPECIFICATION

PART 1 GENERAL PURPOSE( Third Revision)

( Page 1, clause 5.1.3.2 along with Note ) Substitute the following for theexisting:5.1.3.2 Toughened safety glass made from float glass shall not have cluster ofdefects more than those specified for AA quality of sheet glass and toughenedsafety glass made from AA or 4A quality sheet glass shall not have cluster ofdefects more than those speeifkd respectively for AA or A quality of sheetglass, as the case may be, in Table 2 A of IS 2835.

( Page 3, clause 6.2) Insert the following after 6.2(c):d) Name of the material used for interlayer.

( Amendment No. 1 ) Delete Note.

(CHDIO)

Reprography Unit, BIS, New Delhi, India

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AMENDMENT NO. 4 APRIL 2005TOIS 2553 (PART 1) :1990 SAFETY GLASS SPECIFICATIONPART 1 GENERAL PURPOSE

( Third Reviswn )[ Page 1, clause 4(a) ] Insert the word Sheet in between the wordsToughened and Safety.[ Page 1, clause 4(c) ] Insert the word Sheet in between the wordsLaminated and Safety.

( CHD 10 )ReprographyniGBIS,New IMhi, India

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AMENDMENT NO. 5 J ANUARY 200 6TO

IS 2553( PART 1 ) :1 9 9 0 SAFETY GLASS SPECIFICATION

PART 1 GENERAL PURPOSE( T h ird R evis ion )

( First cover page, Title ) Substitute the following for the existing titleand wherever it appears subsequently:SAFETY GLASS SPECIF ICATION

PART 1 ARCHITECTURAL, BUILDING AND RAILWAY USES( T h i r d R evi s io n )

( Page 1, clause 2 ) Substitute the following for the existing clause:2 REFERENCESThe standards listed below contain provisions which through reference in thistext, constitute provisions of this standard. -At the time of publication, theeditions indicated were valid. All standards are subject to revision, and parties toagreements based on this standard are encouraged to investigate the possibilityof applying the most recent editions of the standards indicated below:IS No. Title

1382:1981 Glossmy of terms relating to glass and @ssware (jirst revision )2835:1987 Sp ec ifica tion for fla t t r a n sp ar en t sh ee t g la ss ( third revision)

(CHD1O)