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 7448 (1974): Method for evaluating strength of reactivedyes (monochlorotriazinyl type) by dyeing test [TXD 7:Textile Sizing and Finishing Materials]

IS : 7448 - 1974

Iradian Standard METHOD FOR EVALUATING STRENGTH OF REACTIVE DYES ( MONOCHLOROTRIAZINYL

TYPE) BY DYEING TEST

Dyestuffs Sectional Conimittee, TDC 38

Chaimiarr Representing

SHRI B. V. SHAH The Atul Products Limited, Atul

Mernbcrs

SHBI B. M. BRAHME (Alternate to Shri B. V. Shah )

SRRI C. R. ASNANI The Century Spg & Mfg Co Ltd, Bombay SHRI D. R. SHALHMA ( Alternate )

SHHI K. S. BHARGAVA Rohtas Industries Limited, Dalmianagar SHEI M. G. BHARCAVA Ministry of Defence ( R & D ) SHRI B. V. BHATT The Ahmedabad Manufacturing & Calico Printing

Co Ltd, Ahmedabad SHRI K. G. SHAH ( Alternate )

SHEX S. K. BOSE National Test House, Calcutta DR S. CHATTERJEE Suhrid Geigy Trading Limited, Bombay

SHRI R. N. WADIA ( Alternate ) SHRI N. H. DESAI Ahmedabad Textile Industry’s Research Association,

Ahmedabad DR R. D. DESAI M. G. Science Institute, Ahmedabad S&RI JOGINDER SINQH Directorate General of Technical Development,

New Delhi SHR~ V. S. KENUARE Wool Research Association, Bombay ‘.+&RI H. C. KHATIWALA Arlabs Limited, Bombay DR C. B. KOTHARI The Textile Association ( Ind:a ),

Ahmedabad RetA

SHRI T. A. SUIIRAMANIAM ( A&mate ) DR A. Y. KUI.KARNI Indian Jute Industries’ Research Association,

Calcutta SHRI G. A. KULKARNI

SHRI S. V. DESAI ( Altsmate) Amar Dye-Chem Ltd, Bombay

DR G. G. KUtKARNI Chika Limited, Bombay’ SHRI S. T. CHARI ( Alternate )

DR K. I. NARASI~MHAN Office of the Textile Commissioner, Bombay SHRI K. S. BHUJAIW (Alternate)

Da B. M. PATEI. I. C. I. ( India ) Private Limited, Calcutta SHRI Y. R. MERTA ( Alternate )

SHRI RAJENDER.~ SHANKAR Indian Dyestuff Industries Ltd, Bombay SHHI S. G. PAHULXAR (Alternate )

( Cant inued on page 2 )

Q Co@yright 1974 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.

1 -_ --

IS : 7448 - 1974

( Continued ff om pag* 1 )

Members Representing

SHRI R. RAMAKBISRNAN Binny Limited, Madras DR C. R. RAMACEANDRAN ( AHcrnafc )

DR J. M. RANE Hickson & Dadajee Ltd, Bombay SHRI H. V. DRARWARKAR ( Altdrnatr )

SEBI M. N. RAO The Indian Paint Association, Calcutta SHRI N. S. BEARTIA ( AOemafr )

SERI T. SADASIVAN Giba of India Limited, Bombay SHRI M. N. KROPKAR ( Altrmalc )

SHBI SANTOXH SINWI National Chemical Industries, New Delhi Sam N. S. SARAIYA The Bombay Textile Research Association, Bombay thi~l K. A. SHAH TheEze;i u; Cotton Manufacturmg CO Ltd,

L SERI K. M. SHAH The Millowners’ Association, Bombay DRR.V.R. SURRAYANIAN The Silk & Art Silk Mills’ Research Association,

Bombay SHRI S. M. CHAKRAE~RTY, Director General, IS1 ( fix-oficio Mgmbar )

Director ( Tex )

SHRI D. R. KOHLI

Deputy Director ( Tex ), IS1

Reactive Dyes Subcommittee, TDC 38: 6

SKRI B. M. BRARME

Members

Atic Industries Limited, Atul

SERI S. R. IYER (Alternate to _-~ Shri B. M. Brahme )

SHRI S. V. GOKEALE AhmeJ$az;;tile Industry’s Research Association,

SHRI. J. C. ISSRANI .Ths Dye-stuffs Manufacturers’ Association of India, Bombay

SHRI SHI~ARHAI A. PATEL ( Altarnate ) DR K. C. KASHATRIYA M. G. Science Institute, Ahmedabad SHRI G. A. KULKARNI Amar Dye-C&em Ltd, Bombay DR G. G. KULKAIXNI Chika Limited, Bombay

SHRI S. T. CHABI ( Altmnate) SERI S. G. PARULHAR Indian Dyestuff Industries Ltd, Bombay

SARI V. R. KARMARKAR ( Af~crncrfc ) DR 8. M. PATEL I.C.I. ( India ) Private Limited, Bombay

SHRI Y. R. MEHTA ( Ahmate) IZJR N. R. RAO Hoechst Dyes & Chemicals Ltd, Bombay SHRI T. SADASIVAN Ciba of India Ltd, Bombay

SRRX M. N. K~~OPKAR ( Al&note ) SERI SAN-TOKH SINWi National Chemical Industrie-Pvt Ltd, New Delhi

SHIU PRITTHIPAL SINGE ( &mate) SH~I K. A. SHAH TheAtEh@z; Cotton Manufacturing Co Ltd,

2

IS : 7448 - 1974

Indian Standard, METHOD FOR EVALUATING STRENGTH OF REACTIVE DYES ( MONOCHLOROTRIAZINYL

TYPE) BY DYEING TEST

0. FOREWORD

0.1 This Indian Standard was adopted by the Indian Standards Institution on 8 July 1974, after the draft finalized by the Dyestuffs Sectional Committee had been approved by the Textile Division Council.

0.2 Reactive dyes are marketed in different strengths. The method laid down in this standard for determining the strength of dyestuff against a mutually accepted standard would be useful for assessing the strength of dyestuff.

0.3 In reporting the results of a test or analysis made in accordance with this standard, if the final value, observed or calculated, is to be rounded off, it should be done in accordance with IS : 2-1960*.

1. SCOPE

1.1 This standard prescribes a method for determination of strength of reactive dyes ( monochlorotriazinyl type ) by dyeing test.

2. SAMPLING

2.1 Lot - All the containers of the same dye and of the same concentration delivered to a buyer against a despatch note shall constitute a lot.

2.2 Unless otherwise agreed to between the buyer and the seller, the number of containers to be selected at random from a lot shall be as given below:

Lot Size Sunq!de Size 2 to 15 2

16 ,, 25 3 26 ,, 50 51 ,) 100 Z

101 )) 150 6 151 300 301 acd above

7 8

*Rules for rounding off numerical values (rcuid).

3

IS I7448 - 1974

-2.3 From each container draw small quantities of dye from at least 3 different parts by a suitable sampling instrument and mix them thoroughly to get a composite sample weighing about 20 g. This shall constitute the test sample.

3. STANDARD DYESTUFF

3.1 The standard sample of dyestuff against which the strength of dye- stuff under test is evaluated, shall be as agreed to between the buyer and the seller.

4. QUALITY OF REAGENTS

4.1 Unless specified otherwise pure chemicals shall be employed in tests and distilled water shall be used where the use of water as a reagent is intended.

NOTE-‘ Pure chemicals’ shall mean chemicals that do not contain impurities which affect the test results.

5. EVALUATION OF STRENGTH OF DYESTUFF

5.1 Prepare dyeings of the standard sample of dyestuff (see 3.1) by following the procedure given in Appendix- A; prepare simultaneously additional dyeings of the standard sample, with the percentage variation of dyeing strength by 5 percent on the lower side of the recommended percentage.

5.2 Simultaneously, prepare dyeings of different percentages of the dye- stuff under test by following the procedure given in Appendix A.

5.3 Compare the dyeings as obtained in 5.2 and the dyeings obtained as in 5.1. Select a dyeing of the dyestuff under test which exactly matches with one of the dyeings of the standard dyestuff. Note the percentage of the dyeings which matches exactly.

NOTE - Before comparing the dyeings, they should be spread out properly. The dried hanks should be laid side by side in the same plane and oriented in the same direction. They should be combed to a uniform thickness to avoid the effects of backing on the appearance. The hanks should be compared, if possible, in north skylight. The consistency in strength variation of different dyeings of standard dyestuff and the dyestuff under test should be observed. If the strength variations between the two consecutive dyeings are not constant, the dyeings should be repeated.

6. CALCULATION &;m%zulate the strength of the dyestuff under test by the following

t s--, x 100 where

S = strength of dyestuff, in percent; A = percentage dyeing of the standard dyestuff; and B = percentage dyeing of the dyestuff under test.

4

IS : 7448 - X974

7. REPORT

7.1 Report the value obtained as in 6.1 as the strength in percent of the dyestuff under test.

APPENDIX A ( Clauses 5.1 and 5.2 )

METHOD FOR DYEING REACTIVE DYES (MONOCHLOROTRIAZINYL TYPE)

A-l, APPARATUS

A-l.1 Dye Vessels - porcelain or stainless steel beakers; or dye vessels provided with mechanically agitated dye-baths.

A-l.2 Graduated Pipettes - capable of measuring correct to 0’1 ml.

A-l.3 Volumetric Flask -calibrated to 500 ml.

A-2. DYEING ASSISTANTS

A-2.1 Water - Distilled water (see IS : 1070-l 960* ) shall be used in the preparation of the dye-bath.

NOTE -For rinsing, water having hardness of not more than 50 ppm expressed as calcium carbonate, may be used.

A-2.2 Sodium Chloride Solution or Anhydrous Sodium Sulphate Solution - 20 percent (m/z!),

NOTE-Quality of sodium sulphate is extremely important. Commercial brands may be acidic or alkaline, therefore, they shall be neutralized.

A-2.3 So&urn Carbonate SoIution - 10 percent (m/u ).

A-2.4 Soap Solution - containing 0.3 percent (m/u) of neutral detergent.

A-3. PREPARATION OF HANKS FOR DYEING

A-3.1 A sufficient number of hanks of scoured, bleached, unmercerised cotton yarn having no finishing chemicals or blueing agent shall be used in this test. Each hank should weigh 10 f 0.1 g (see Note 2).

Norm: 1 -Any yarn normally used in the laboratories for carrying out trials or yarn of the following requirements is suitable for this test:

a) Count - 10 tex x 2 or ( 6Os/2 ),

b) Twist per metre - 750, and

c) Cuprammonium fluidity not more than 5 rhes.

*Specification for water, distilled quality ( rsuised).

IS : 7448 - 1974

NOTE 2 - If the mass of the hank is not 10 f 0.1 g then it should be weighed accurately and the amount of. dyestuff and the chemicals to be taken should be calculated accordingly.

A-3.2 Preparation of the Test Hanks-The hanks shall be treated in boiling water for 10 minutes, squeezed evenly to contain approximately its own weight of water, cooled and entered into the dye-bath.

A-4. PROCEDURE

A-4.1 Preparation of the Dyestuff Solution-Weigh accurately 1’0 g of the dyestuff under test. Paste the dyestuff with cold water and dissolve by adding warm water ( not higher than 80°C). The total volume of water used for dissolution of the dyestuff should not exceed 100 ml. Dilute the solution with cold water and make up 500 ml in a volumetric flask.

A-4.1.1 Similarly, prepare a solution of the standard dyestuff by following the procedure given in A-4.1 but taking the standard dyestuff instead of the dyestuff under test.

A-4.2 Dyeing ( for 1 O f 0’ 1 g hank)

A-4.2.1 Pipette out separately the required amount of solution of dye- stuff under test in the dye-vessels SO as to give 1.9, 2’0 and 2.1 percent depth. Add the requisite quantity of water and 100 ml of sodium chloride solution or anhydrous sodium sulphate solution to make the volume of the dye liquor 300 ml leaving sutiient margin for the addition of alkali. Heat the dye-bath to 4O”C, stir the dye liquor and enter the wetted hanks. Raise the temperature to 80°C in 15 minutes and continue dyeing for further 30 minutes. Turn the hanks frequently so as to obtain level dyeings. Add 60 ml of anhydrous sodium carbonate solution and.dye for a further 30 minutes. Remove the dyeings, squeeze the dyed hanks evenly. Rinse the dyeing first in cold water and then in hot water. Treat the dyed hanks at boil for 15 minutes in a soap solution at liquor to material ratio of 30: 1; rinse in cold water and again treat the hanks at boil for 15 minutes in soap solution at liquor to material ratio of 30: h Finally, rinse the dyeings in cold water and dry.

NOTE - For rractioe blue 3, blue 25 and similar products - Dissolve these dyes at 50”~. Use 50 parts f maximum ) anhydrous sodium sulphate ( do not use sodium chloride ) and dye at temrjerature of 90°C:

&thrr addition of alkali - In addition to anhydrous sodium carbonate solution, add < predissolved caustic soda ( 100 percent ), 2 parts per 1 000 parts of dye liquor soon

after the dye-bath has attained the final dyeing temperature.

i-4.2.2 Similarly, pipette out separately required amounts of solution of the standard dyestuff in separate dye-vessels ( see Note). Dye the

, hanks by following the method given in A-4.2.1. NOTE- The dyeings with the solutions of the dyestuff under test and of the

standard dyestuff should be donesimultaneously in the same water-bath.

6

a: ( Reaffirmed 2006 )