Test Method 154-2011
Fixation Properties of Disperse Dyes
in 1978 by AATCC Committee RA87
Purpose and Scope
This test method is used to determine the fixation properties of disperse dyes
on polyester/cellulose blends as a function of fixation conditions. The
variable described herein is temperature; however, variations in time and/or concentration
of dyes and/or auxiliaries may be studied by this method.
The dye is padded onto the blend fabric at a specified concentration; the fabric
is dried and the dye is fixed by exposure to controlled conditions of time and
temperature. The cotton portion of the blend is dissolved in concentrated
sulfuric acid followed by neutralization and thorough rinsing.
reflectance values of the dyed fabrics, exposed to several fixation conditions,
are determined by spectrophotometry and the concentrations of dye relative to
the heaviest dyeing (as 100%) are evaluated by applying the Kubelka-Munk function
(K/S). These results express the relative dye fixation for a particular
set of dyeing conditions. Alternatively, the dye on the fabric can be extracted
with a suitable solvent and the concentrations of the dye determined by transmittance
spectrophotometry. When the dye concentrations on the fixed samples are
compared to the corresponding concentration on a padded but unfixed sample,
a measure of the true dye fixation, as a function of applied dye, may be obtained.
Copyright © 2012 American Association of Textile Chemists and Colorists, Research Triangle Park, N.C., USA
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