ISO 105-Z06:1998 pdf download.Textiles一Tests for colour fastness - Part Z06:Evaluation of dye and pigment migration
I Scope
This part of ISO 105 describes a method for assessing the migration propensity of a pad liquor system containing dyes or pigments, subsequently referred to as colorants, and which may also contain different types and amounts of migration inhibitors. The degree of migration is obtained by visual examination or by reflectance measurements.
The test method may be used to compare the migration propensity of dyes and the effect on migration of different types of migration inhibitors, thickeners and electrolyte. The method may also be used to evaluate a pad liquor with which migration has been found on a continuous dye range.
2 Normative reference
The following standard contains provisions which, through reference in this text, constitutes provisions of this part of ISO 105. At the time of publication, the edition indicated was valid. All standards are subject to revision and parties to agreements based on this part of ISO 105 are encouraged to investigate the possibility of applying the most recent edition of the standard listed below. Members of IEC and ISO maintain registers of currently valid International Standards.
ISO 105-A02: 1993. Textiles - Tests for colour fastness - Parr A02 Grey scale for assessing change in colour.
4 Principle
Fabric impregnated with test colorant alone, or with test colorant and migration inhibitor, is dried while partially covered with a watch glass, permitting differential drying and therefore, migration to occur. The degree of migration is evaluated by visual examination or by reflectance measurements of the covered and uncovered areas.
NOTES
I When drying conditions are not constant and/or uniform, uneven migration may occur, causing shade variations during a run, or shade differences between the face and back, or between the side and centre of the fabric.
2 The pad liquor composition may he modified by varying the amount or type of migration inhibitor and tested in the laboratory prior to the application on the range. The colorant concentration, the fabric and the wet pickup should be the same in the laboratory as used on the range. It is then possible to correlate the test results with the improvement experienced in ractice.
Two procedures are described:
Procedure A. The fabric assembly is allowed to dry at room temperature. The procedure is very simple. but time- consuming (overnight).
Procedure B. The fabric assembly is dried in a laboratory dryer or oven, either with, or without air circulation. This procedure is faster but somewhat more complicated than procedure A.
5 Apparatus and materials
5.1 Fabric pieces for dyeing.
NOTE — For disperse dyes, vat dyes and pigments. gencraiiy tne prelerred tabric is a blend 01 h) ‘Yo:i) ‘Yo (?flhlfl) polyester:
cotton gabardine or heavy twill, heat set, bleached and merceri,ed. For soluble dyes with affinity to cellulose (e.g. reactive dyes), the preferred fabric is a bleached and merceri,ed 100 % cotton gabardine or heavy twill. However, any other fabric intended for use on a continuous dye range may be chosen.ISO 105-Z06 pdf download.