Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. इंटरनेट मानक “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda “Invent a New India Using Knowledge” “प0रा1 को छोड न’ 5 तरफ” Jawaharlal Nehru “Step Out From the Old to the New” “जान1 का अ+धकार, जी1 का अ+धकार” Mazdoor Kisan Shakti Sangathan “The Right to Information, The Right to Live” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 14997 (2001): Modified Poly (Pheneylene Oxide) (PPO) Resins for its sage use in Contact with Foodstuffs, Pharmaceuticals and Drinking Water [PCD 12: Plastics]
Transcript
Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.
इंटरनेट मानक
“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”
“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru
“Step Out From the Old to the New”
“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan
“The Right to Information, The Right to Live”
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
“Invent a New India Using Knowledge”
है”ह”ह
IS 14997 (2001): Modified Poly (Pheneylene Oxide) (PPO)Resins for its sage use in Contact with Foodstuffs,Pharmaceuticals and Drinking Water [PCD 12: Plastics]
Is 14997:2001
Indian StandardMODIFIED POLY (PHENYLENE OXIDE) (PPO) RESINSFOR ITS SAFE USE IN CONTACT WITH FOODSTUFFS,
PHARMACEUTICALS AND DRINKING WATER —SPECIFICATION
ICS 67.250; 83.080.20
0 BIS 2001
BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
October 2001 Price Group 4
/
Plastics Sectional Committee, PCD 12
.
.+5.
FOREWORD
This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the PlasticsSectional Committee had been approved by the Petroleum, Coal and Related Products Division Council.
Plastics are being used on a large scale for packaging of foodstuffs and pharmaceuticals. Where direct contactoccurs between the packed commodity and the plastics, the high-molecular mass polymer itself does not pose atoxic hazard being inert and essentially insoluble in food. There is, however, a likelihood that some transfer ofpolymer additives, adventitious impurities, such as monomers, catalyst remnants and residual polymerizationsolvents and of low molecular mass polymer fractions will occur from the plastics into the packaged materialwith consequent toxic hazard to the consumers. The occurrence of acute toxicity due to plastics materials incontact with food is most unlikely, since only trace quantities of potentially toxic materials are likely to migrate.However, the accumulation of these materials with time may lead to hazards which maybe serious.
Poly (phenylene oxide) (PPO) or poly [l,4-(2,6-dimethyl phenyl) ether] was discovered by John Hay in 1956and was developed commercially by General Electric Co, under the trade name ‘NORYL RESIN’ in 1965-66.The chemical formulation is based on the oxidative coupling of substituted phenols and the elimination of amolecule of water. PPO resins are usually alloyed with polystyrene materials. It acts as a base for a large familyof resins with typical heat distortion temperature ranging from 82°C to more than 150”C. The chemical resistancecharacteristics of PPO are fairly consistent. These resins are noted for their resistance to hydrolysis in acids,bases, salts and hot water, but can be attacked by certain hydrocarbons, esters, ketones, amines and halogenatedcompounds. PPO resins offer the designer a combination of attractive properties including heat resistance,good impact strength, strong tensile and flexural properties at elevated temperatures and a wide processingrange. They also feature low specific gravity and low moisture absorption rates. High energy radiation such asgamma or X-rays causes little loss of properties of the UV-stabilized grades, even at high dosages. Mouldedarticles can be sterilized by autoclave, gas or irradiation without any harm to the material.
PPO resins can be processed in a number of ways, but the bulk of applications are in injection moulding. PPOcan also be extruded and therrnoformed and various processes such as blow moulding, compression moulding,cold forming and rotational moulding have been used with varying degrees of success.
Modified po}y(phenylene oxide) (PPO) resins find wide usage in food contact and health care applications.Some of the most important and known applications of modified PPO resins in this area are pump impellers anddiffusers, filter-picals and drinking water.
Use of modified PPO-resins is guided by EEC Directives 90/128/EEC in Europe. In USA it is regulated byFDA, 21, CFR 177,2460. For potable water application several grades of modified PPO resins are registeredunder DVG W and Hygiene Institute, Gelsenkirchen (Germany), Institute d’ Analysis et d’ Essais du Centre -Ouest (France) and WRC (UK).
This standard is intended to be used with the series of Indian Standards on plastics for food contact applicationwhich is given in Amex A.
It is emphasized that these standards need to be used in combination to provide a system of control to themanufacturers of plastics as well as the fabricators of thermoplastics packaging materials to derive maximumbenefits. Besides it may also serve as basis for official agencies to frame suitable legislation to ensure effectivesafeguards for the safety and health of consumers where thermoplastics for food contact applications are concerned.
The composition of the Committee responsible for formulation of this standard is given in Annex C.
For the purpose of deciding whether a particular requirement of this standard is complied with, the final value,observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance withIS 2:1960 ‘Rules for rounding off numerical values (revisec$’. The number of significant places retained inthe rounded off value should be the same as that of the specified values in this standard.
IS 14997:2001
Indian Standard
MODIFIED POLY (PHENYLENE OXIDE) (PPO) RESINSFOR ITS SAFE USE IN CONTACT WITH FOODSTUFFS,
PHARMACEUTICALS AND DRINKING WATER —SPECIFICATION
1 SCOPE
1.1 This standard specifies the requirements andmethods of sampling and test for modified poly(phenylene oxide) (PPO) for the manufacture of itemsused in contact with foodstuffs, pharmaceuticals anddrinking water.
1.2 This standard does not purport to establishsuitability of modified poly (phenylene oxide) (PPO)in contact with particular foodstuff, pharmaceuticalor drinking water, from other than toxicologicalconsiderations.
2 REFERENCES
The following standards contain provisions whichthrough reference in this text, constitute provisions ofthis standard. At the time of publication the editionsindicated were valid. All standards are subject torevisions, and parties to agreements based on thisstandard are encouraged to investigate the possibilityof applying the most recent editions of the standardsindicated below:
1SNo. Title4905:1968 Methods for random sampling9833:1981 List of pigments and colorants for
use in plastics in contact withfoodstuffs, pharmaceuticals anddrinking water
9845:1998 Determination of overall migrationof constituents of plastics materialsand articles intended to come incontact with foodstuffs, pharma-ceuticals and drinking water —Method of analysis (secondrevision)
14996:2001 Positive list of constituents ofmodified poly (phenylene oxide)(PPO) in contact with foodstuffs,pharmaceuticals and drinking water
3 TERMINOLOGY
3.1 Modified Poly(Phenylene Oxide) (PPO)
A polymeric alloy based on PPO resin produced byoxidative coupling reaction of 2,6-Dimethyl phenoland other thermoplastic materials like polystyrene,
HIPS, ABS, polycarbonate, polyamides, etc.
4 REQUIREMENTS
4.1 Basic Resin
As defined in 3.1 in any mixing proportion.
4.2 Material
The material shall also comply with the thresholdlimits of the manufacturing residues, polymerizationingredients and auxiliary items as prescribed inIS 14996.
4.3 Pigments and Colorants
In case the coloured material is used for food contactapplications it shall comply with the list and limits ofthe pigments and colorants prescribed in IS 9833.
4.4 Overall Migration
The material shall also comply with the overallmigration limits to 60 mg/1, Max of the simulant and10 mg/dm2, Max of the surface of the material orarticle, when tested by the method prescribed inIS 9845.
4.5 Storage and Control
4.5.1 Storage
Modified PPO intended for food contact use shall bestored separately from other materials in closed,properly identified containers.
4.5.2 Control
An authorized person shall supervise and control theissue of modified PPO to the process or manufacturingarea and shall maintain appropriate written recordsof the issue of such materials.
4.5.3 Adequate standards of hygiene shall bemaintained at all times and plant operator and storemen shall be trained in proper hygiene practices.
5 PACKING AND MARKING
5.1 Packing
The material shall be packed in suitable plastic, paperor laminated paper bags, as agreed to between the
1
----
. .
IS 14997:2001
purchaser and the supplier, in a manner so as to ensurethat the items do not become contaminated duringstorage.
5.2 Marking
5.2.1 Each package shall be clearly marked with thefollowing:
a) Name and type of the material;
b) Indication of the source of manufacture andrecognized trade-mark, if any;
c) Date of manufacture;
d) Batch No. or Code No.; and
e) ‘Food-grade’ material.
5.2.2 The packages shall also carry the symbol(see Fig. 1) clearly embossed/printed on it (inaccordance with the EEC Directive 80/590/EEC‘Symbol’ that shall accompany materials and articlesintended to come into contact with foodstuffs).
5.2.3 BIS Certification Marking
The package may also be marked with the StandardMark.
5.2.3.1 The use of the Standard Mark is governed by
ANNEX A
(Foreword)
LIST OF INDIAN STANDARDS ON PLASTICS SUITABLE FOR USE IN CONTACT WITH
IS No.
9833:1981
9845:1998
10141:2001
10142:1999
FOODSTUFFS, PHARMACEUTICALS AND DRINKING WATER
Title
List of pigments and colorants foruse in plastics in contact withfoodstuffs, pharmaceuticals anddrinking waterDetermination of overall migrationof intended to come into contact withfoodstuffs — Method of analysis(second revision)Positive list of constituents ofpolyethylene in contact with food-stuffs, pharmaceuticals and drinkingwater (j2rst revision)Polystyrene (crystal and highimpact) for its safe use in contactwith foodstuffs, pharmaceuticals anddrinking water @st revision)
IS No.
10146:1982
10148:1982
10149:1982
10151:1982
Title
Polyethylene for its safe use incontact with foodstuffs, pharma-ceuticals and drinking waterPositive list of constituents ofpolyvinyl chloride (PVC) and itscopolymers in contact with food-stuffs, pharmaceuticals and drinkingwaterPositive list of constituents ofpolystyrene (crystal and high impact)in contact with foodstuffs, pharmac-euticals and drinking waterPolyvinyl chloride (PVC) and itscopolymers for its safe use in contactwith foodstuffs, pharmaceuticals anddrinking water
FIG. 1 SYMBOL
the provisions of the Bureau of Indian Standards Act,1986 and the Rules and Regulations made thereunder.Details of conditions under which a Iicence for theuse of the Standard Mark may be granted tomanufacturers or producers, maybe obtained from theBureau of Indian Standards.
6 SAMPLING
The method of drawing representative sample of thematerial and the criteria for conformity shall be asprescribed in Annex B.
---
2
6<—
IS No.
10171:1999
10909:2001
10910:1984
11434:1985
11435:1985
11704:1986
11705 1986
12229:1987
12247:1988
12248:
12252:
988
987
Title
Guide on suitability of plastics forfood packaging (second revision)Positive list of constituents ofpolypropylene and its copolymers incontact with foodstuffs,pharmaceuticals and drinking water(first revision)Polypropylene and its copolymers forits safe use in contact with foodstuffs,pharmaceuticals and drinking water[onomers resins for its safe use incontact with foodstuffs,pharmaceuticals and drinking waterPositive list of constituents ofionomer resins for its safe use incontact with foodstuffs,pharmaceuticals and drinking waterEthylene/acrylic acid (EAA)copolymers for its safe use in contactwith foodstuffs, pharmaceuticals anddrinking waterPositive list of constituents ofEthylene/acrylic acid (EAA)copolymers for their safe use incontact with foodstuffs,pharmaceuticals and drinking waterPositive list of constituents ofpolyalkylene terephthalates (PET &PBT) for their safe use in contactwith foodstuffs, pharmaceuticals anddrinking waterNylon-6 polymer for its safe use incontact with foodstuffs,pharmaceuticals and drinking waterPositive list of constituents ofNylon-6 polymer for its safe use in contactwith foodstuffs, pharmaceuticals anddrinking waterPolyalkylene terephthalates (PET &
IS No.
13449:1992
13576:1992
13577:
13601:
992
993
14971:200
14972:2001
14996:2001
14998:2001
14999:2001
Is 14997:2001
Title
PBT) for their safe use in contactwith foodstuffs, pharmaceuticals anddrinking waterPositive list of constituents ofethylene vinyl acetate (EVA)’copolymers in contact withfoodstuffs, pharmaceuticals anddrinking waterEthylene methacryiic acid (EMAA)copolymers and terpolymers for theirsafe use in contact with foodstuffs,pharmaceuticals and drinking waterPositive list of constituents ofethylene methacrylic acid (EMAA)copolymers and terpolymers incontact with foodstuffs,pharmaceuticals and drinking waterEthylene vinyl acetate (EVA)copolymers for its safe use in contactwith foodstuffs, pharmaceuticals anddrinking waterPolycarbonate resins for its safe usein contact with foodstuffs,pharmaceuticals and drinking waterPositive list of constituents ofpolycarbonate resins in contact withfoodstuffs, pharmaceuticals anddrinking waterPositive list of constituents ofmodified poly (phenylene oxide)(PPO) resins in contact withfoodstuffs, pharmaceuticals anddrinking waterPositive list of constituents ofmelamine-formaldehyde resins incontact with foodstuffs,pharmaceuticals and drinking waterMelamine-formaldehyde resins forits safe use in contact with foodstuffs,pharmaceuticals and drinking water
444,
i
:,1.
,; ,,.
.,
,; ,,
!.
1,
Is 14997:2001
ANNEX B
(Clause 6)
SAMPLING OF MODIFIED PPO RESINS
B-1 GENERAL
B-1.1 In drawing, preparing, storing and handlingsamples, the following precautions and directions shallbe observed .
B-1.2 Samples shall not be taken in an exposed place.
B-1.3 The sampling instrument, wherever applicable,shall be made of stainless steel or any other suitablematerial on which the material shall have no action.The instrument shall be clean and dry.
B-1.4 Precautions shall be taken to protect thesamples, the material being sampled, the samplinginstrument and the containers for samples fromadventitious contamination.
B-1.5 The samples shall be placed in suitable, clean ,dry, air-tight metal or glass containers on which thematerial has no action. The sample containers shallbe of such a size that they are almost completely filledby the sample.
B-1.6 Each sample container shall be sealed air-tightwith a stopper after filling and marked with full detailsof sampling, such as, the date of sampling, the monthand year of manufacture of the material, etc.
B-1.7 Samples shall be stored in such a manner thatthe temperature of the material does not vary undulyfrom the normal temperature.
B-2 SCALE OF SAMPLING
B-2.1 Lot
In a single consignment all the packages of the sameclass, same type, same form and belonging to the samebatch of manufacture shall be grouped together toconstituent a lot. If a consignment is known to consistof packages belonging to different batches ofmanufacture or different forms, the packagesbelonging to the same batch of manufacture and sameform shall be grouped together and each such groupshall constitute a lot.
B-2.2 For ascertaining the conformity of the materialto the requirements of this specification, samples shallbe tested from each lot separately. The number of
packages to be sampled shall depend on the size ofthe lot and shall be in accordance with COI1 and 2 ofTable 1.
Table 1 Scale of Sampling
(Clause B-2.2)
Number of Packages Sample Sizein the Lot
(1) (2)up to 15 216 to 50 351 to 100 410I to 300 5
301to 500 6501 to 1000 8
1001 and above 10
NOTE — When the number of packages in the lot is less thanthree, all the packages shall be sampled.
B-2.2.1 These packages shall be selected at a randomfrom the lot and in order to ensure the randomness ofselection, procedures given in IS 4905 may befollowed.
B-3 PREPARATION OF TEST SAMPLES
B-3. 1 From each of the packages of material selected,small portions of material shall be drawn with the helpof a suitable sampling instrument. The total quantityof material collected from each package shall besufficient to test all the requirements given in 4.
B-3.2 In the case of packages consisting of containers,vials, rolls or films, the number of items to be selectedfrom a package, for testing each of the requirementsgiven in 4 shall be one.
B-4 NUMBER OF TESTS
Tests for determining all the requirements given in 4shall be carried out on the individual test samples.
B-5 CRITERIA FOR CONFORMITY
The lot shall be declared as conforming to therequirements of this specification if all the test resultson individual samples meet the relevant specificationrequirements.
i,
4.,”,
, !!:,
,
Is 14997:2001
ANNEX C
(Foreword)
COMMITTEE COMPOSITION
Plastics Sectional Committee, PCD 12
Orgaaizalion
Internet Exchange Next.com Limited, MumbaiAmines and Plasticizers Ltd, Mumbai
Bakelite Hylarn Lid, Hyderabad
Building Materials and Technology Promotion Council,New DelhiCentral Instituteof PkrsticsEngineeringandTechnology,Chennai
Central Food Technological Research Institute,Mysore
Indian Centre for Plastics in Environment, MumbaiIndianPetrochemicalsCorporation Limited,Vadodara
Indian Instituteot’Packaging, Mumbai
Indian Plastics Institute, Mumbai
IndianToxicological ResearchCentre, LucknowJain Irrigation Systems Ltd, Jalgaon
Larsen & Toubm Ltd, Mumbai
Ministry of Dctimcc (R&D), Kanpur
Ministry of Dcfence, RDSO, Lucknow
Ministry of Health and Family Welfare, DGHS,New Delhi
Ministry of Food Processing lodustries, New DelhiNational Chemical Laboratory, Pune
National Dairy Development Board, Anand
National Organic Chemical IndustriesLtd, Mumbai
Nuchem Ltd, FirridabadPermali Wallace Ltd, Bbopal
Representative(s)
SHSJSARUPCHOWDWRY(Chairrrron)
.Yaa V. V. KuwwwDRR. V. UTEKAR(Mfernafe)
DRC. S.NABASIMHANDRM. BALAKIUSHNAN(Allerrrafe)
Sm[ J.SmciuprADRVIJ~ Kumrt
DRK.Pmmhmu (Alternate)
SHRIS. K. Ktmt.mStarrBALDEVWJ (Akwrate)
SHRI%rrv.mBASUSm V. K. SINGH(Alternate 1)SW MANISHKHANDELWAL(Alternate 11)
Gmsrw M.4NAGERDR(Smmwn) lWmm 13wmowN(Alternate)
DRB. K. DESAIDRU. M. Vmm (Alterrra[e)
Smi B.D.ADHVARYUDRY.P. SINGH(Alternate)
%uu SHANKARB.mmmSrrruAMITAVASANYAL(Alternate)
SHFUs.v.PARv72mSsu=aN. C. DHDCENDRANAIH(Alternate)
DRA. N. BHATSHRIJ. B. KAMAT
SHRIV. C.’FRANCIS(Alternate)
SHRIP.V.NARAYANAN
DRN. G. MOKASHI(A/fernate)SHRID.R. PATEL
.%roR. K. ACCARWAL(Alternate)DRV.P.SswmwDRH.C. MRUMVUNJAYA
SHRIS. B. Josm (Alternate 1)
SHRIA. P. CHOUDHARI(Alternate 11)SHRIV.Mom
Smu R. SUBARAO(Alternate)
SHRIM.N. SARAFDRL, D. KHANDPAL(Alfernate)
JOINDrRELTOR(RUBBER)DIRECTOR(SS) (A[ferrrate)
ADDLDIRECTORGmw (PFA)SHruSormm Lw (Ahernute)
SHRI0. P.GssuDRS S. MAHAIAN
DRS. S. KULKARNI(Alternate)DRR.S. LATHANA
SHRJS. K. KHANDELWAL(Alternate)
SHRIV.K.SHARMASW J. K. VADDDAFOA(Alternate)
DRR.M. MEH’TASHRIC. C. SAKARDA
SHRIS. K. KODESIA(Alternate)
--
- (Continued orrpage 6)
5
Is 14997:2001
(ContinuedJrom page 5)
Organization
Reliance Industries Ltd, Mumbai
Saint-Gobain Vetrotex India Ltd, Hyderabad
Shivalik Agro-Poly Products Ltd, Parwanoo (H.P.)
Shriram Fertilizers& Chemcials, Kota
Shriram Institute for Industrial Research, DelhlSupreme Petrochem Ltd, Mumbai
Tata Engg & Locomotive Co Ltd, Jamshedpur
The All India Plastics Manufacturers Association, Mumbai
The Plastics & Linoleums Export Promotion Council, MumbaiVIP Industries, Mumbai
XPRO India Ltd, Faridabad
BIS Directorate General
Representative(s)
DRY.B.VASUDEODRK. S. JADHAV(Alternate)
SHrus.SUNOARAMSHNS.K. GHOSH(Alternate 1)
DR B. J. C. BASU(Alternate 11)SrauARuNANAND
SW YOGRAJKAPUR(Alternate)
SHRIM. S. TRIPATMSmu R. C. GumA (Alternate)
DR R. C. SDDDSHRIR. RANGARAIAN
StrruB. A. RAKHANGI(Alternate)
SHSUU. K.NATHSHSUMAmA. D. SATHE(Alternafe)
SrwuR.K.AGGARWALSHRIK. B. EASWARAN(Akerrrate)
SHRIR.P.KALYANFWRSHRISroomvmmROY
.%mrA. S. DALVE(Alternate)
SW C. BhaskarSHFOMANMOHANKSUSHAN(A1/ernate)
SmrrANJANK&
Dbector & Head (PCD)~epresenting Director General (Ex-oj7icioA4ember)]
Member-Secretary
SHIUT. KALAIVANAN
Joint Director (PCD), BIS
Plastics in Food Packaging and Allied Industries Subcommittee, PCD 12:12
Organization
CentrrdFood Technological ResearchInstitute,MysoreAll India Plastic IndustriesAssociation, DelhiAS& T India Limited, New DelhiBakelite Hylam Ltd, Mumbai
Britamria Industries Ltd, Bangalore
Cerrtrefor Processed Food, Barrgalore
Central Committee for Food Standards (DirectorateGerrersdof HerdthServices), New Delhi
Central Food Laboratory, Kolkata
Defence Food Research Laboratory,Mysore
Drugs Controller (India), New DelhiGE Plastics India Ltd, Distt Vadodara
Gujarat State Fertilizers Co Ltd, Vadodara
Haldia Petrochemicals Ltd, Kolkata
Hhrdustan Lever Ltd. Mumbai
Hhkari Potteries Ltd, New DelhiIndian Institute of Packaging, Mumbai
Representative(s)
SHRIK. R. KUMAR(Convenor)SHRIRAWKUMARSmrrG.D.AGIUWALDRC.SHANKAR
Rollantainers Ltd, FaridabadSriram Fertilizers& Chemicals, Kota
Supreme Petrochem Ltd, Mumbai
XPRO Indi%Faridabad
Representative(s)
SW J.B, KAMATSW V. C. FRANCIS(Alternate)
DRP. K.SESHSENIORExa.cmrwSHRIJ. K. VAIMDARIA
SHRIV. K. SHARMA(Alfernafe)
DR K.S.JAOHAVDRR. RANGAPRASAD (Alternate)
SHRJSANJAYAVARMASHIUM. S.TRIPATHI
Sr+ruR. C. GUPTA(,4/ternafe)SHIUR. RANGARAJAN
SHSUB. A. RARHANGI (Alternate)
sHruPANKAImSHSUVrr.mmGrJPrA(Alternate)
---
1
L&L–:
Bureau of Indian Standards
BIS is a statutory institution established under the Bureau of Zndian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goodsand attending to connected matters in the country.
Copyright
BIS has the copyright of all its publications. No part of these publications may be reproduced in any formwithout the prior permission in writing of BIS. This does not preclude the free use, in the course ofimplementing the standard, of necessary details, such as symbols and sizes, type or grade designations.Enquiries relating tv copyright be addressed to the Director (Publications), BIS.
Review of Indian Standards
Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodically; a standard along with amendments is reaffirmed when such review indicates that no changes areneeded; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of‘BIS Catalogue’ and ‘Standards: Monthly Additions’.
This Indian Standard has been developed from Doc : No. PCD 12 (1376).
Amendments Issued Since Publication
Amend No. Date of Issue Text Affected
BUREAU OF INDIAN STANDARDS
Headquarters :
Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002 Telegrams : ManaksansthaTelephones :3230131,3233375,323 9402 (Common to all offices)
Regional Offices : Telephone
Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg
{
3237617NEW DELHI 110002 3233841
Eastern : 1/14 C.I.T. Scheme VII M, V. 1. P. Road, Kankurgachi
