IS 14444 : 2023 Textile Dyestuffs - Method for Determination of Relative Colour Strength of Dyes in Solution

ICS 59.040; 71.040.50

TXD 07

1 SCOPE

This standard prescribes a method for determination of colour strength of a dye in relation to that of a standard dye by means of spectrophotometric absorption measurements on solutions of dyes.

NOTES

1 Basic requirements for this method are that the dye solutions do not scatter light and obey the Bougher – Lambert – Beer law as well as identical or similar absorption curves of samples and the reference in the visible region of spectrum.

2 Identical or similar absorption curves are usually obtained if the tests are carried out for the purpose of dye production control of batches/deliveries of the same dye. This method is not applicable for the evaluation of dyes with distinctly different absorption curves.

3 The colour strength of a dye is not a physical constant, since it is dependent, for example, on the test medium and test method. The colour strength determined by this method therefore may differ with those found by other determinations that is instrumental or visual assessments of dyeings.

2 REFERENCE

The standards given below contain provisions which through reference in this text, constitute provision of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of these standards:

IS No.	Title
IS 1070 : 2023	Reagent grade water - Specification (fourth revision)