FB-6 is an off white powder largely disperses itself in
water to give a slightly turbid solution with a weakly
alkaline reaction. Its stability is not impaired at a
pH above 3. Separation of free formaldehyde that occurs
with some resin tanning agents in the float or in the
leather is unlikely with Jktan FB-6.
FB-6 is anionic and therefore compatible with all
anionic tanning agents, dyes and auxiliaries. If it is
to be applied together with cationic products, e.g.
chrome tanning agents, in the retannage, it is advisable
to test beforehand whether precipitation will occur. The
product is incompatible with aluminum tanning agents.
Jktan FB-6 renders the leather fuller, particularly in
the loosely structured areas and imparts to it a fine,
closed grain and a soft handle. Moreover, the resultant
leather is characterized by its good dyeing properties.
Jktan FB-6 has hardly and lightening effect on the
colour and improves the buffing properties of the
leather suede and nubuck as well.
FB-6 is used in the retannage generally in combination
with synthetic or synthetic and vegetable tannins which
can all be added together in powder form. The
temperature of the float should lie as usual in such
relating processes at about 40o C. Although the
application of the resin tanning agent is largely
independent of the pH value, it is advisable to
neutralize before the retannage.
the leathers retanned with Jktan FB-6 are milled, they
form a finer and more uniform milled grain, even if they
are toggled in the wet state.