Accordingly, as far as the variation in the metal content of
pre-mordanted fabric samples, the changes in K/S and tints, as
well as in the UPF values of the obtained dyeings as a function
of the mordant type, keeping its concentration constant at
150 mmol/L, Table 3 shows that: (i) incorporation of any of the
used Zr, Zn, or Al-salt mordant in pre-mordanting step results in
a significant improvement in K/S of obtained dyeings and without
adversely affecting the initial red color, (ii)