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 8101 (1976): Poster colours [CHD 14: Printing, Inks,Stationary and Allied Products]

IS : 8101 - 1976

Indian Standard SPECIFICATION FOR POSTER COLOURS

UDC 75.023.21

© Copyright 1976

I N D I A N S T A N D A R D S I N S T I T U T I O N MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002 September 1976

AMENDMENT NO. 1 MARCH 1979 TO

IS : 8101-1976 SPECIFICATION FOR POSTER COLOURS

Alterat ion

( Pages 5 and 6, Appendix A ) — Substitute the following for the exist­ing appendix:

' A P P E N D I X A ( Clause 3.2 )

D E T E R M I N A T I O N OF LEAD

A-1. A P P A R A T U S

A-1.1 Separat ing F u n n e l — of 500-ml capacity.

A-1.2 N e s s l e r Tube — of 50-ml capacity.

A-2. REAGENTS

A-2.1 Di lute Nitric Acid — lead-free, approximately 4 N.

A-2.2 A m m o n i u m Acetate Solut ion — lead-free, 10 percent ( m/v ).

A-2-3 Citric Ac id Solut ion — lead-free, 0.5 g per ml.

A-2.4 A m m o n i a — Concentrated, of redistilled quality.

A-2.5 P o t a s s i u m Cyanide Solut ion — 10 percent ( m/v).

A-2.6 Standard Lead Solution — Dissolve 0.40 g of lead nitrate [ Pb ( No3 )2 ] in water containing 2 or 3 ml of concentrated nitric acid and make up the volume to 1 000 ml with water. Transfer 10 ml of this solution to a volumetric flask, add 2 or 3 ml of concentrated nitric acid and dilute with water to 1 000 ml. O n e millilitre of this solution contains 2.5 μg of lead ( as Pb ). The diluted solution shall be freshly prepared.

A-2.7 Di th izone Solut ion — Dissolve 0.01 g of dithizone in 100 ml of carbon tetrachloride, shaking intermittently for 1 hour. Allow to stand overnight and shake once again before using. This shall be kept in a cool and dark place. This gives a 0 01 percent solution. Filter, if necessary.

1

Dilute 10 ml of this solution to 100 ml with carbon tetrachloride in a 100-ml volumetric flask. This shall be prepared fresh before determination. This gives a solution of 0.001 percent.

N O T E 1 — C a r b o n t e t r ach lo r ide used should be fur ther purified. O n e l i t re of ca rbon t e t r ach lo r ide i s ex t rac ted wi th two por t ions of 25 ml of d i l u t e a m m o n i u m h y d r o x i d e a n d then kept over 100 g of a c t i v a t e d carbon . Before use, i t is d e c a n t e d a n d d is t i l led at a b o u t 80°C over a l i t t l e fresh l i m e .

N O T E 2 — Some t imes d i th izone solid and its 0.01 pe rcen t solution de t e r i o r a t e on s to r age . T h e 0.01 p e r c e n t so lu t ion shou ld , therefore, be tes ted before fur ther d i lu ­t i o n , by shak ing 2 ml of t he solut ion w i t h 5 ml of 1 pe rcen t a m m o n i u m hydrox ide-I f t he o rgan ic l aye r i s only faint ly ye l low u n d e r these condi t ions the solut ion m a y be used. If i t is deep ly co loured i t shall be d i sca rded and fresh solution be p repa red . T h e so lu t ion as wel l as t h e r e a g e n t s h o u l d be stored in a ref r igera tor a n d exposure to sun l i gh t should be avoided d u r i n g ana ly t i c a l work. To increase the s tabi l i ty o f 0.01 p e r c e n t solut ion, i t should be covered wi th a th in aqueous l ayer sa tu ra t ed w i t h s u l p h u r d i o x i d e .

A-3. PROCEDURE A-3.1 Treat about 20 g of the material accurately weighed, with dilute nitric acid in a porcelain basin. The quantity of the acid used is immate­rial provided it is sufficient to extract the soluble matter; but avoid too great an excess since it has to be evaporated off. Allow the basin to stand on a boiling water-bath for at least 3 hours. In case a large quantity of insoluble residue is left, heat the basin on a water-bath overnight. Decant off the supernatant liquid through a quantitative filter paper and extract the insoluble residue again on a boiling water-bath for one hour with dilute nitric acid. Filter through the same filter paper and wash the residue on the filter paper thoroughly with hot water*. Collect the filtrates and wash' ings in a 500-ml separating funnel. Add about 2 ml of citric acid and make the solution ammoniacal with pH between 8.5 to 10 (bluish-green to blue towards a drop of thymol blue), after neutralizing and adding 5 ml of 10 percent potassium cyanide solution. Extract the lead with successive 20 ml portions of dithizone reagent. Drain the organic layers into a Nessler tube and stir well.

Take several aliquots of the standard lead-solution into a series of separating funnels, and develop the colour as in the case of sample. Extract the organic coloured layers into a series of Nessler tubes. Compare the colour developed from the sample solution with those of the standard solutions. Note the volume of the standard with which the colour of the test solution matches. If the colour of the test solution is intermediate between two standard solutions then repeat the experiment by taking more number of standard solutions in that range and arrive at exact colour matching.

* T r e a t t h e res idue on t he f i l ter paper w i t h 10 ml of a m m o n i u m a c e t a t e solut ion, filter a n d wash wi th ho t water .

2

A-4. CALCULATION

A-4.1 Lead (as Pb) , ppm =

where V = volume in ml of standard lead solution matching with the

test solution, f = mass in g of lead equivalent to 1 ml of standard lead solu­

tion, and M = mass in g of the material taken for the test.'

( CDC 13 )

3 Printed at New India Printing Press, Khurja, India

Inks and Allied Products Sectional Committee, CDC 13

Chairman

D R M . I . M A T T H E W S

Members

Representing

Directorate of Industries & Commerce, Government of Tami l N a d u , Madras

SHRI C. N. BALAKRISHNAN ( Alternate to Dr M. I . Mat thews )

S H R I B . L . A R U K I A S H R I P . N . G A N D H I (Alternate)

SHRI J. A. ASTAPUTRE S H R I R. N R A M (Alternate )

S H R I A . R . B A S U S H R I H. M I T R A ( Alternate )

S H R I M. L . BHATTACHARYA

S H R I A. SEN ( Alternate ) S H R I A . B I S W A S

DR P. K. S E N ( Alternate ) S H R I M . K . C H I T R E

Korea ( Ind i a ) L td , Bombay

Ministry of Defence ( D G I )

Controller of Stationery, New Delhi

Directorate of Industries ( Qual i ty Mark ing Scheme ), Government of West Bengal, Ca lcu t ta

Bharat Carbon and Ribbon Manufac tu r ing Co L t d , New Delhi

Development Commissioner, Small Scale Industries New Delhi

S H R I P. SATYANARAYAN ( Alternate ) S H R I S . D. DANDEKAR Camlin Pvt L td , Bombay

S H R I M . G . DANDEKAR (Alternate) S H R I B . C . D U T T A

S H R I G. P. M A D A N ( Alternate) S H R I R . G . G U P T A

S H R I V. V. T A L W A R ( Al ternate ) P R O F H . G . HANMANTE S H R I N . G . M A I T R A

S H R I P . K . P Y N E S H R I R. SETHURAMAN

Surveyor Genera l of India, Dehra D u n

National Archives of Ind ia , New Delhi

Directorate of Arts, Maharash t ra State , Bombay Stationery and Office Equipment Association of I nd i a ,

Calcut ta Nat ional Test House, Calcut ta Essen and Company , Bangalore

S H R I R. VISWANATHAN ( Alternate ) S H R I B . G . T H O R A T Maharash t ra State Bureau of Tex t Book Product ion

and Curr iculum Research, Bombay

( Continued on page 2 )

© Copyright 1976 INDIAN STANDARDS INSTITUTION

This publication is protected under the Indian Copyright Act ( XIV of 1957 ) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act.

IS : 8101 - 1976

Indian Standard SPECIFICATION FOR POSTER COLOURS

IS : 8101 - 1976

( Continued from page 1 )

Members

SHRI S. VISWANATHAN S H R I K . V . G . K R I S H N A M U R T H Y

(Alternate ) D R G . M . SAXENA,

Director ( Chem )

Representing

Chelpark Co L t d , Bangalore

Director General , I S I ( Ex-officio Member )

Secretary S H R I S . K . M A T H U R

Deputy Director ( Chem ), ISI

P a n e l fo r A r t i s t s ' C o l o u r s , C r a y o n s a n d A l l i e d M a t e r i a l s ,

Convener

S H R I P . N . G A N D H I

Members DR T. R. BHAMBHANI ( Alternate

Shri P. N. Gandh i ) SHRI S. A. AHMED

S H R I ABDULLAH ( Alternate ) S H R I S . D. D A N D E K A R

CDC 13 : P7

Korea ( Ind i a ) L td , Bombay

to

Lefranc & Bourgeois ( I n d i a ) Pvt L td , Madras

Camlin Pvt L t d , Bombay S H R I A. D . BHATWADEKAR ( Alternate )

DIRECTOR, M A P PUBLICATION, D E H R A D U N

D I R E C T O R , P ILOT M A P PRODUC­TION P L A N T , HYDERABAD ( Alternate )

S H R I M. M G H O S H P R O F H . G . HANMANTE S H R I N . G . MATTRA

S H R I P . N A N D I ( Alternate ) S H R I M. E . M A R A T H E S H R I M . L . RAMAMURTHY

S H R I M . R . CHANDRASEKHARAN ( Alternate)

D R K . V . R A O S H R I K . L . R A T H I

DR A. S. G U L A T I ( Alternate)

Surveyor General of I nd i a , Dehra DUN

Shal imar Paints Ltd , Calcut ta Directorate of Arts, Maharash t ra Sta te , Bombay Sulekha Works L t d , Calcut ta

Colour-Chem Limited, Bombay Poor Cot tage Industr ies , K u m b a k e n a m

Geological Survey of India , Calcutta Sudarshan Chemical Industries L td , Pune

2

IS : 8101 - 1976

Indian Standard SPECIFICATION FOR POSTER COLOURS

0 . F O R E W O R D 0.1 This Indian Standard was adopted by the Indian Standards Institution on 7 Ju ly 1976, after the draft finalized by the Inks and Allied Products Sectional Committee had been approved by the Chemical Division Council.

0.2 Poster colours are a range of artists' colours which are opaque and mat t in character and are used by designers for commercial work.

0.3 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 founded off in accordance with IS : 2-1960*. T h e number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

1. SCOPE

1.1 This standard prescribes the requirements and the methods of sampling and test for poster colours. 2. TERMINOLOGY

2.1 For the purpose of this standard, the definitions given in IS : 4395-1967† and IS : 4724-1968‡ shall apply.

3. REQUIREMENTS 3.1 Descr ip t ion

3.1.1 The material shall be in the form of a semi-viscous paste. It shall essentially consist of a water soluble or dispersible binder, a pigment or pigments with or without extenders, a plasticizer and a preservative.

3.1.2 The pigment shall be finely ground and shall not separate from the vehicle.

3.2 The material shall contain not more than 10 parts per million of lead when tested as prescribed in Appendix A.

*Rules for rounding off numerical values ( revised ). †Glossary of terms relating to ink and allied industries. ‡Glossary of terms relating to printing inks and allied industries.

3

IS : 8101 - 1976

3.3 The pigment shall not bleed in the binder when tested according to the method prescribed in Appendix B. 3.4 The vehicle shall not cause flocculation of the pigment. When one gram of the paste is thoroughly mixed with 30 g of the vehicle and a portion observed under a magnification of × 300 it shall show no sign of pigment particles aggregating to form small scattered bunches. 3.5 Opac i ty — T h e material shall be opaque, with proper application, from deepest colour and through dilution with water to palest colour, when tested according to the method prescribed in Appendix C. 3.6 Misc ib i l i ty — The material shall be readily dispersible with water, shall be easily wetted and shall not peel off or crack when applied on drawing paper ( see IS : 3064-1964* ). The different colours shall mix with one another to form uniform hues.

3.6.1 The material shall mix satisfactorily with one another to give uniform, opaque, intermediate tone.

3.7 Colour — The material shall be of the following colours:

1) 2) 3) 4) 5) 6)

7) 8) 9)

Magenta Mauve Cobalt blue Prussian blue Cerulean blue Ultramarine

blue Light green Medium green Deep green

10)

11) 12)

13) 14) 15) 16) 17)

Turquoise green

Dark green Permanent

yellow Lemon yellow Yellow ochie Orange Crimson lake Scarlet lake

18) 19) 20) 21) 22) 23)

24) 25) 26)

Vermilion Carmine Pink Burnt sienna Burnt umber Vandyke

brown Grey Black White

3.8 P e r f o r m a n c e — The material shall comply with the requirements of the test prescribed in Appendix D.

3.9 G r o w t h of M o u l d — When tested according to the method prescribed in Appendix E, the material shall not show any growth of mould.

4. KEEPING QUALITY

4.1 The material shall not dry when stored in the original glass or plastics containers for two weeks in an air-oven at 50 ± 1°C.

*Specification for hood-made drawing paper.

4

IS : 8101 - 1976

5.1 Packing — The material shall be packed in suitable glass or plastics containers of 15, 30, 120, 225 and 450 ml capacity or any other packing as agreed to between the purchaser and the supplier. The cap of the container shall be securely fixed. 5.2 Marking — Each container shall be marked with the following information:

a) Name of the material; b) Colour; c) Net contents; d) Date of packing; c) Name of the manufacturer and/or his recognized trade-mark, if

any; and f) Lot number to enable the batch of manufacturer to be traced from

records. 5.2.1 The containers may also be marked with the ISI Certification

Mark. NOTE — The use of the ISI Certification Mark is governed by the provisions of the

Indian Standards Institution ( Certification Marks ) Act and the Rules and Regulations made thereunder. The ISI Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well-defined system of inspection, testing and quality control which is devised and supervised by ISI and operated by the producer. ISI marked products are also continuously checked by ISI for conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the ISI Certification Mark may be granted to manufacturers or processors, may be obtained from the Indian Standards Institution.

6. SAMPLING

6.1 R e p r e s e n t a t i v e samples o f t h e ma te r i a l shall be d r a w n a n d a d j u d g e d as p r e sc r ibed i n A p p e n d i x F .

A P P E N D I X A

DETERMINATION OF LEAD

A-1. REAGENTS

A-1.1 Dilate Nitric Acid — lead-free, of strength approximately 4N.

5

5. PACKING AND MARKING

( Clause 3.2 )

IS : 8101 - 1976

A-1.2 A m m o n i u m Acetate So lut ion — lead-free, 10 percent (m/v). A-1.3 Concentrated Su lphur ic Acid — lead-free (see IS : 266-1961 * ). A-1.4 D i l u t e Sulphur ic Acid — about 2 percent . A-1.5 A m m o n i u m Acetate — solid, lead-free. A-1.6 Hydrogen Sulphide — gas, from Kipps ' apparatus. A-1.7 Hydrogen Sulphide Water — saturated solution. A-2. PROCEDURE A-2.1 Trea t about 20 g of the material, accurately weighed, with dilute nitric acid. T h e quantity of acid is immaterial provided it is sufficient to extract the soluble matter; but avoid too great an excess since it has to be evaporated off. Allow the basin to stand on a boiling water-bath for at least three hours. In case a large quantity of insoluble residue is left, heat the basin on the water-bath overnight. Decant off the supernatant liquid through a filter paper and extract the insoluble residue again on a boiling water-bath for one hour with dilute nitric acid. Filter through the same filter paper and wash the residue thoroughly on the filter paper with hot water. Treat the residue on the filter paper with 10 ml of ammonium acetate solution, filter and wash again. Mix the filtrates and washings in a 500-ml evaporating basin, add 2 ml of concentrated sulphuric acid, and evaporate the contents of the basin on a sand-bath till fumes appear. Add 100 ml of water to the basin and allow to stand on the boiling water-bath for 15 minutes. Then dilute the contents to about 150 ml and allow to stand overnight at room temperature. Filter the insoluble matter on a Whatman filter paper No. 42 or its equivalent (9 cm ) and wash thoroughly with dilute sulphuric acid.

A-2.1.1 Transfer the filter paper and residue to a small beaker, cover with 20 ml of water, and add 1 to 2 g of solid ammonium acetate. Heat the beaker on the water-bath for not less than half-an-hour, stirring the contents occasionally. Decant t he liquid through a Whatman, filter paper No. 42 or its equivalent (9 cm ). Repeat the extraction with water and ammonium acetate. Transfer all the insoluble matter including the filter pulp to the filter paper and wash thoroughly with warm water, collecting the filtrate and washings in a 150-ml beaker. Pass hydrogen sulphide through the liquid for 10 to 15 minutes and filter the precipitated lead sulphide at once through a Whatman filter paper No. 40 or its equivalent (9 c m ) . Wash thoroughly but quickly with hydrogen sulphide water, keeping the residue in the filter paper, if any, covered with liquid till the washing is completed. Transfer the precipitate and filter paper to a tared silica crucible. Dry in an oven and carefully ignite adding 1 to 2 drops of concentrated sulphuric acid to ash, cool and weigh as lead sulphate. From the difference in mass of the crucible, calculate the mass of lead and express as parts per million of the mass of the material taken for test.

*Specification for sulphuric acid (revised).

6

IS : 8101 - 1976

A P P E N D I X B ( Clause 3.3 )

TEST FOR BLEEDING OF PIGMENT B-1. PROCEDURE B-1.1 Draw with an artists' brush, filled with sable or squirrel tail hair (conforming to size A-6 of IS : 1103-1971*), a stripe 20 mm wide and 50 mm in length with chromatic material on white drawing paper ( see IS : 3064-1964† ). Allow it to dry completely, lift with a wetted brush white poster colour and draw stripe 5 mm wide and 10 mm in length over the stripe of the coloured shade.

B-1.1.1 The material shall satisfy the requirements of the test if the white stripe after drying shall show no evidence of staining due to chromatic ( coloured ) stripe.

A P P E N D I X C (Clause 3.5)

TEST FOR OPACITY

C-1. PROCEDURE C-1.1 Draw with an artists' brush a stripe 10 mm wide and 50 mm in length with drawing ink, waterproof, black ( conforming to IS : 789-1971‡ ) on a white drawing paper. Lift with a wetted brush the required quantity of coloured material and draw stripe 20 mm wide over the black stripe.

C-1.1.1 The material shall be considered opaque if the coloured stripe substantially obliterates the black stripe.

A P P E N D I X D ( Clause 3.8 )

TEST FOR PERFORMANCE

D - 1 . PROCEDURE D-1.1 Spread out the material in the usual manner on a white drawing paper ( see IS : 3064-1964† ) 50 mm wide and 100 mm in length. T h e

*Specification for brushes, artists' ( second revision ). †Specification for hand-made drawing paper . ‡Specification for ink, drawing, waterproof, black ( f irst revision ) .

7

IS : 8101 - 1976

amount of the material taken up by the brush can be adjusted to yield full chroma and uniform opaque shade in a single coat. Cut this paper in three equal strips breadthwise and use one strip as control and other two strips for the test in D-1.1.1 and D-1.2.

D-1.1.1 Ten minutes after the colour has been spread, rub the second strip with the dry finger tips and then with a pen knife, steel or electric eraser. There shall be no blurring or smudging and the colour shall be free from tendency to flake off when compared with the control strip.

D-1.2 Ul tra-Vio le t Ray Exposure — Place the third strip at a distance of 255 mm from an ultra-violet lamp normal to the rays, and expose for a total period of 36 hours. All colours, with the exception of green and violet, shall show no evidence of fading when compared with the original stripes. Green and violet shall show no fading after exposure for 24 hours. The test shall be carried out at 40 to 46°C.

D-1.2.1 T h e ultra-violet lamp shall be of 125 watts and of long wave UV region, chiefly at 3655 Å.

A P P E N D I X E ( Clause 3.9 )

TEST FOR GROWTH OF MOULD

E-1. PROCEDURE

E-1.1 Transfer 5 g of the material into a 50-ml beaker, dilute it with equal volume of water, stir it uniformly with glass rod. Inoculate with a mixture of spores of (a) Asperigillus niger, (b) Pullularia pullulans, and (c) Penicillium. pinophilum. Keep in a moist chamber for two weeks at 37 ± 1°C. After the expiry of this period, the material shall not show any growth of mould or separation of pigments.

A P P E N D I X F ( Clause 6.1 )

S A M S U N G OF POSTER COLOURS

F-1. GENERAL REQUIREMENTS OF SAMPLING

F-1.0 In drawing, preparing, storing and handling test samples, precau­tions and directions given in F-1.1 to F-1.7 shall be observed.

8

IS : 8101 - 1976

F-1.1 Samples shall not be taken in an exposed place.

F-1.2 The sampling instrument shall be clean and dry when used.

F-1.3 Precautions shall be taken to protect the samples, the material being sampled, the sampling instrument and the containers for samples, from adventitious contamination.

F-1.4 To draw a representative sample, the contents of each bottle selected for sampling shall be thoroughly mixed.

F-1.5 The samples shall be filled in clean, dry, air-tight glass containers on which the material has no action.

F-1.6 The sample containers shall be of such a size that they are almost completely filled by the sample.

F-1.7 Each sample container shall be sealed air-tight with a stopper after fining, and marked with full particulars of the material as given in 5.2 and the date of sampling.

F-1.8 Samples shall be stored in such a manner that the temperature of the material does not vary unduly from the normal temperature.

F-2. SCALE OF SAMPLING

F-2.1 Lot — All the bottles of the same size in a single consignment from the same batch of manufacture shall constitute a lot.

F-2.1.1 Samples shall be tested from each lot for ascertaining the conformity of the material to the requirements of the specification.

F-2.2 T h e number ( n ) of bottles to be chosen from a lot shall depend on the size of the lot ( N ) and shall be in accordance with Table 1.

9

TABLE 1 SCALE OF SAMPLING L O T SIZE

N

(1) Up to 15

16 „ 50 51 „ 150

151 and above

N o . OF BOTTLES TO BE SELECTED

n

(2) 2 3 5 8

IS : 8101 - 1976

F-2.3 These bottles shall be chosen at random from the lot and to ensure randomness of selection, random number tables shall be used ( see IS : 4905-1968* ). In case such tables are no t available, the following procedure may be adopted:

Starting from any bottle count them as 1, 2, 3, ..., etc, up to r and so on, in one order. Every rth bottle thus counted shall be withdrawn to give a sample for test, where r is the integral par t of N/n ( N being the lot size and n the number of bottles to be chosen from the lot ).

F-3. TEST SAMPLES A N D REFEREE SAMPLES

F-3.1 Before drawing the samples, the material in the bottles chosen (see F -2 .2 ) shall be thoroughly mixed by shaking or stirring or rolling. Samples shall then be drawn with the help of a suitable sampling instru­ment.

F-3.2 From each of the bottles three test samples shall be drawn, the quantity of each sample being sufficient to conduct all the testa specified in 3.2 to 3.9. All the test samples thus obtained shall be transferred to sample containers ( see F-1.5 ) and marked with all the details of sampling

( see F-1.7 ). These samples shall then be separated into three identical sets of test samples in such a way that each set has a test sample represent­

ing each bottle selected ( see F-2.2 ). One of these three sets shall be for the purchaser, another for the supplier, and the third for the referee.

F-3.3 Referee S a m p l e — Referee sample shall consist of the set of test samples ( see F-3.2 ) marked for this purpose and shall bear the seals of both the purchaser and the supplier and shall be kept at a place agreed to between the two.

F-4. NUMBER OF TESTS F-4.1 Tests for all the requirements of the specification given in 3.2 to 3.9 shall be conducted on each of the samples in a set.

F-5. CRITERIA FOR CONFORMITY

F-5.1 A lot shall be declared as conforming to the requirements of the specification if each of the test results satisfies all the relevant requirements of the specification individually.

*Methods for random sampling.

10

I N D I A N S T A N D A R D S

O N

I N K S A N D A L L I E D P R O D U C T S

I S :

219-1962 Ink powder and tablets (revised) 220-1972 Ferro-gallo tanna te fountain pen i n t (0.1 percent i ron con t en t ) (second

revision) 221-1962 Ink fluid, blue black, for permanent records (revised) 222-1962 Ink fluid for general purposes ( revised ) 393-1975 Ink , s tamp-pad (first revision) 394-1963 Ink , cloth marking (revised) 788-1971 I n k . drawing, waterproof, coloured (first revision ) 789-1971 I n k , drawing, waterproof, black ( first revision )

1221-1971 Dye based fountain pen inks (first revision) 1222-1973 Ink, duplicat ing, for twin cylinder rotary machines ( second revision ) 1234-1957 Ink stencil, oil base , for marking porous surfaces, colour as required 1333-1973 Ink , duplicating, for single d r u m rotary machine (first revision ) 1379-1959 Ink , stencil, oil base, for marking non-porous surfaces, colour as required 1380-1959 Ink, finger printing black 1440-1959 Ink , metal s tamp, black 1551-1959 Carbon paper for typewriters 1581-1975 Ferro-gallo t anna te fountain pen ink ( 0.2 percent iron content ) 2230-1962 Dye, methylene blue, for ink industry 2247-1962 Dye, ink blue, for ink industry 2694-1963 School chalks, moulded, white 3450-1966 Carbon papers , handwrit ing 4174-1967 Typewriter ribbons 4175-1967 Correcting fluid 4222-1967 Coloured chalks, moulded 4395-1967 Glossary of terms relating to ink and allied industries 4747-1968 Pads for rubber stamps 5086-1969 Stencil paper 5805-1970 Ball point pen ink 6897-1973 Methods of test for tannic acid 6898-1973 Methods of test for gallic acid 8075-1976 Back coated carbon papers for typewriter 8100-1976 Wate r colours for students I N D I A N S T A N D A R D S I S T I T U T I O N Manak Bhavan, 9 Bahadu r S h a h Zafar Marg, NEW DELHI 110002 T e l e p h o n e : 27 01 31 ( 20 lines ) T e l e g r a m s : M a n a k s a n s t h a

Branch Offices:

' P u s h p a k ' , Nurmohamed Shaikh Marg, Khanpur 'F ' Block, Unity Bldg, Naras imhara ja S q u a r e Ah imsa Bldg, S C O 82-83, Sec to r 17C 5-3-56/57 Nampally S ta t ion Road 117/418 B Sa rvodaya N a g a r B .C . I . Bldg ( 3rd Floor ) , Gandhi Maidan Eas t Hantex Bldg ( 2 n d F l o o r ) , Rly Sta t ion Road

A H M A D A B A D 380001 BANGALORE 560002 CHANDIGARH 160017 HYDERABAD 500001 KANPUR 208005 P A T N A 800004 TRIVANDRUM 695001

2 03 61 2 76 49 2 83 20 4 57 11

82 72 5 36 55

32 27 Printed at Neelkamal Printers, Delhi, India

Regional Offices:

W e s t e r n : Novelty C h a m b e r s , Grant Road E a s t e r n : 5 C h o w r i g h e e A p p r o a c h Sou the rn : C.I.T. C a m p u s , Adyar

BOMBAY 400007 C A L C U T T A 700072 M A D R A S 600020

T e l e p h o n e

37 97 29 23-08 02 41 24 42