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है”ह”ह

IS/ISO 105-A05 (1996): Textiles - Tests for colour fastness: Part A05 Instrumental assessment of change in colour fordetermination of grey scale rating [TXD 5: Chemical Methodsof Test]

1S/1S0 105-A05 :1996

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Indian Standard

TEXTILES — TESTS FOR COLOUR FASTNESSPART AO!5 INSTRUMENTAL ASSESSMENT OF CHANGE IN

DETERMINATION OF GREY SCALE RATING

ICS 677.016.47:620.191.73.05

COLOUR FOR

@ BIS 2006

BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

December 2006 Price Group 3

.;.E!!!!!?Chemical Methods of Test Sectional Committee, TX 05

NATIONAL FOREWORD

This Indian Standard (Part A05) which is identical with ISO 105-A05 :1996 ‘Textiles — Tests for Colourfastness — Part A05 : Instrumental assessment of change in colour for determination of grey scalerating’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau ofIndian Standards on the recommendation of the Chemical Methods of Test Sectional Committee andapproval of the Textile Division Council.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard withoutdeviations. Certain conventions are, however, not identical to those used in Indian Standards. Attentionis particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they shouldbe read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practiceis to use a point (.) as the decimal marker.

[n this adopted standard, reference appears to the following International Standard for which IndianStandard also exists. The corresponding Indian Standard which is to be substituted in their rdace islisted below along with its degree of equivalence for the edition indiqated:

International Standard Corresponding lndian.Standard,

ISO 105-J03 : 1995 Textiles — IS 15098 :2002 Textiles — Method

Degree of

Equivalence

for TechnicallyTests for colour fastness — determination of colour fastness — Method Equivalen~Part J03 : Calculation of colour for calculation of colour differencedifference

The composition of Technical Committee responsible for the preparation of this standard is given inNational Annex A.

In reporting the results of a test or analysis made in accordance with this standard, if the final valueobserved or calculated, is to be rounded off, it shall be done in accordance with IS 2:1960 ‘Rules forrounding off numerical values (revised)’.

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1S/1S0105-A05 :1996

Indian Standard

TEXTILES — TESTS FOR COLOUR FASTNESSPART A05 INSTRUMENTAL ASSESSMENT OF CHANGE IN COLOUR FOR

DETERMINATION OF GREY SCALE RATING

i

*,

1 Scope

This part of ISO 105 specifies an instrumental method for assessing the change in colour of a test specimen incomparison to an identical untreated reference, and the calculations undertaken to convert the instrumentalmeasurements into a grey scale rating.

This method is intended as an alternative to the many national methods for visual evaluation of the effect of acolour fastness test on any textile material.

NOTE1 There may be a difference betwaen instrumental and visual assessments of specimens due to fluorescence,and/or other factors.

2 Normative references

The following standards contain provisions which, through reference in this text, constitute provisions of this partof ISO 105. At the time of publication, the editions indicated were valid. All standards are subject to. revision, andparties to agreements based on this part of ISO 105 are encouraged to investigate the possibility of applying themost recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currentlyvalid International Standards.

ISO 105-J03: 1995, Textiles — Tests for colour fastness — Part J03: Calculation of colour differences.

CIE Publication No. 5.2, Co/orimetfy, 2nd cd., 1986.’)

3 Principle

The colour of the specimen which has been subjected to the colour fastness test and the colour of an identicaluntreated specimen are measured instrumentally. The CIELAB coordinates for lightness L“, chroma C;b and hueh,b are determined for both specimens, and the CIELAB differences AL”, AC~band ~~b are calculated and con-verted to a grey scale rating by means of a series of equations.

1) Available from the CIE Central Bureau, Kegelgasse27, A-1030 Vienna, Austria.

1S/1S0 105-AO5 :1996

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.’

4 Apparatus

4.1 Spectrophotometeror calorimeter, meeting any one of the illuminating and viewing conditions for re-flecting specimens as described in CIE Publication 15.2, subclause 1.4.

b5 Test specimen

Choose a representative sample of material which has been subjected to a colour fastness test, of adequate sizeto fit the sample holder of the instrument used and having no visible defects. Back a single layer of the testspecimen with an opaque white material containing no fluorescent whitening agents (FWA). Both the test speci-men and the untreated reference shall be backed in an identical manner.

NOTE2 Alternatively, back the test specimen with a number of thicknesses of the identical untreated material sufficient togive an acceptablyopaque specimen.

6 Test procedure

6.1 From the untreated material, prepare a reference consisting of the same number of thicknesses of malerialas that used to prepare the test specimen (see clause 5). Mount the reference in the sample holder and measureIts colour values with the instrument (see 4.1). From the instrument system, obtain CIE tristimulus values usingCIE iiluminant 065 and 10° observer. Calculate the CIELAB L“, C~band h,b values using the data obtained, asspecified in ISO 105-J03.

NOTE3 Permitted illuminant/observer alternatives for calorimetric calculations are: D65/2; C/2”; C/l (Y.

6.2 Measure the colour of the specimen (see clause 5) in the same manner and calculate the CIELAB I,”, C&and habvalues.

7 Calculation of change in colour

7.1 Calculate the differences in lightness AL”, chroma AC& and hue M7:b between the reference and specimenfrom the data obtained in clause 6.

7,2 Calculate the change in colour AEF using the following equations, where:

the subscripts S and R refer to test Specimen and Reference respectively;

the subscript N is used to indicate functions of the means of the values of the specimen and reference;

the subscript K is used to indicate corrected hue and chroma functions;

the subscript F is used to indicate special calorimetric values, to distinguish them from the CIELAB calorimetricvalues in common usage.

AEF= [(AL*)2 + (ACF)2-t (AHF)2]’12

AHF= AHK/[l + (1OCM/l 000)2]

ACF= ACK/[l + (20CM/1 000)2]

AHK= AH:b– D

ACK= AC& – f)

D = (AC:bCM.e-~/l OO

2

k.,$,1 1S/1S0105-A05 :1996

CM= (c:b,S + C;b,fl) /2

x= [(hM – 280)/30]2 if 1~ - 280[ < 180

x= [(360- lh~-2801)/30]2 if 1~-2801 >180

‘M= (%b,S + %b,R)/2 if Ik,s - &b,RI <180

& = (hb,S + hb,R)/2 + 180 if lh3b,S- hb,Rl ~ 180 and lhb,S + &b,R! <360

hM = (&b,s + ~b,R)/2 -180 if I~b,s - ~~,fl I >180 and I~,~ + ~,~ I a 360

~, C&, h,b,~ = lightness, chroma and hue of Specimen

L& C&R, ~~,fl = lightness, chroma and hue of Reference

AL*, AC;b and ~~b are calculated in accordance with ISO 105-J03:1 995, subclause 3.2.

8 Determination of grey scale rating for colour change

Using AEF calculated in 7.2, determine the grey scale rating for colour change (GSC), expressed to the nearesthalf-point (e.g. 5; 4,5; 4; etc.), either from table 1 or from equation (1) or equation (2).

NOTE 4 Use of equation (1) or equation (2) produces a continuous function, yielding a decimal value of GSCcompared to thestepwise value obtained from table 1.

GS = 5 – [A.EF/l,7] if A&s 3,4 . . . (1)

GS = 5 – [log10(AEF/0,85 )/log102] if AEF>3,4 . . . (2)

Table 1

Rangeof AEF GSC

<0,40 5

0,40 s AEF<1,25 4,5

1,25< A.EF<2,10 4

2,10< AEF<2,95 3,5

2,95< AEF<4,10 3

4,10 G AEF<5,80 2,5

5,80< AEF<8,20 2

8,20< AEF<11,60 1,5

>11,60 1

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1S/1S0 105-AO5 :1996

9 Test report

The test report shall contain at least the following information:

a)

b)

c)

d)

e)

f)

the number and year of publication of this part of ISO 105, i.e. ISO I05-A05:1996;

all details necessary for complete identification of the specimen(s) tested;

identification of the spectrophotometer or calorimeter used, including the CIE geomet~ type;

test conditions, including illuminant and observer used;

grey scale rating GSCdetermined for each test specimen, expressed to the nearest half-pointetc.).

date of the test.

(e.g. 5; 4,5; 4;

4

1S/1S0 105-A05 :1996

NATIONAL ANNEX A

(National Foreword)

COMMITTEE COMPOSITION

Chemical Methods of Test Sectional Committee, TX 05

Organization

Textiles Committee, Mumbai

Bapuji Institute of Engineering & Technology, Davangere

Central Institute for Research on Cotton Technology, Mumbai

Central Pollution Control Board, Delhi

Clariant India Ltd, Mumbai

Directorate of Standardization (Production & Supplies),New Delhi

In personal capacity (Z Siddhi Vinayak CooperativeGroupHousing Societ~ Swatantrya Veer Savarkar Marg,Prabhadevi, Dada~ Mumba/)

Indian Institute of Carpet Technology, Bhadohi

Indian Jute Industries’ Research Association, Kolkata

Jaya Shree Textiles, FLshra

L. N. Chemical Industries, Mumbai

Maniklal Verma Textile Institute, Bhilwara

Man-Made Textile Research Association, Surat

Ministry of Defence (DGQA), Kanpur

Ministry of Defence (R&D), Kanpur

Office of the Textile Commissioner, Mumbai

Premier Colorscan Instruments Pvt,Ltd, Thane

Rajasthan Spinning and Weaving Mills Ltd, Noida

Reliance Industries Ltd, New Delhi

SNDT Women’s University, Mumbai

Suditi Industries Ltd, Mumbai

Sunil Industries Ltd, Mumbai

Texan Lab, Mumbai

Textiles & Engineering Institute, Ichalkaranji

The Bombay Millowner’s Association, Mumbai

Representative(s)

DR G. S. NAOIGER (Chakman)SHRI E. VISWAMBHARAM(Alternate)

OR H. L. VIJAYKUMARDR K. MURUGESHBABU(Alternate)

DR (Ms) C. R. RAJEDR R. H. BALASUBRAMANYA(Alternate)

DR M. Q. ANSARISHRIAJAYAGGARWAL(A/ternate)

DR V. G. NAYAK

LT-COL(Dn) R. SFIIVASTAVALT-CORB. MANJUNATH(Alternate)

SHRIM. B. DIXIT

PROF(DR) K. K. GOSWAMISHRIMATIBETTYDASGUPTA(Alternate)

SHRIA. K. BANERJEE

SHRIABHEYNAIRSHRIPAWANSHARMA(Alternate)

SHRIKETANL. GANDHI

DR N. K. MATHUR

DR SANDEEPR. NAIKSHRI M. G. PATEL(A/ternate)

LT-COL P. P. NAIOUSHRIRAMAYADAV(A/temate)

Ms ARCHANAVmsMs PRIYANKAKATIYAR(A/ternate)

SHRIR. A. LAL

sHRr RAYMONORAMRAJI@.RSHRI D. 1.DESAI(Alternate)

SHRI K. D. JOSHISHRIVIJAYYAOAV(Alternate)

SHRI 1?K. BADAMISHRISANJEEVISRANI(Alternate)

DR (Ms) BHARATIA. PATWAROHAN

SHRI R. CWNRAJSHRIRAJENORAGAIICWAO(Alternate)

SIIRI VINOC)G. LATHSHRIRAMESHKHANNA(Alternate)

SHRIULLHASNIMKARSHRIRAHULBHAJEKAR(Alternate)

PROFS. K. LAGAPROFS. S. CHINCHWADE(Alternate)

SHRIMAHESHSHARMA

5

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1S/1S0 105-A05 :1996

*

Organization

The Bombay Textile Research Association, Mumbai

The South India Textile Research Association, Coimbatore

The Synthetics & Art Silk Mills’ Research Association,

Mumbai

University Department of Chemical Technology, Mumbai

Veermata Jeejabai Technological Institute, Mumbai

Wool Research Association, Thane

BIS Directorate General

Representative(s)

SHRI B. S. ACHARYASIiRI P. R. MIST~Y(Alternate)

SHFVD. BALASUERAMANIAN

SHRIK. S. TARAPOREWALASHRID. L. SHAH(Alternate)

PROFM. D. TELI

PROFS. R. SHUKLA(A/ternate)

PROFK. D. GAWAND

SHRIMATI“G. P. RANESHRIV.C. PANSE(Alternate)

SHRIM. S. VERW Direotor and Head (TXD)[RepresentingDlreotorGeneral(Ex-ificioj]

Member SecretarySHRIANILKUMAR

Joint Director (Textiles), BIS

6

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*

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This Indian Standard has been developed from Dot: No. TX 05 (0791).

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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