Dyeing mineral tanned leather with anionic dyes.
producing level and pure shades, the leather is treated
for about 10 minutes with 0.1 – 0.5% of Jktan LA
(calculated on shaved weight) before the dye is added.
For obtaining very pale shades and considerably deeper
penetration, 1.5% is used.
Topping with basic dyes on chrome leather dyed with
The leather predyed with anionic dyes is first treated
in the dyebath with anionic fatliquors and about 15
minutes after the usual fixation with acid 0.2 to 0.5%
of Jktan LA (calculated on shaved weight) is added and
drumming is continued for 30 minutes. Topping with
basic dye can then be affected in fresh bath.
Dyeing vegetable tanned leather with anionic dyes.
For producing more level and paler shades, add 1-5% of
Jktan LA (calculated on dry weight) to the dyebath in
For improving the light fastness of dyeings or for
producing white leather, it is advisable to replace
Jktan LA by Jktan LF.