Properties

TRUPOTAN 2BL is a full tanning agent with high affinity, which ensures a good exhaustion, a good softness and excellent fullness.

TRUPOTAN 2BL has a strong bleaching effect on chrome tanned leather, and final dyeings are always clean and brilliants.

The leathers retanned with TRUPOTAN 2BL show excellent buffing ability.

Application

In the vegetable tanning, TRUPOTAN 2BL shows an excellent dispersing effect on the vegetable tanning extracts, this greatly facilitates the penetration of vegetable extract and  provides dyeing with light, clean and even colours.

Thanks to its medium astringency, TRUPOTAN 2BL is very suitable in the retanning of Wett-Blue, providing good fullness, very fine and smooth grain and always excellent dye level. In the production of nubuc will improve the buffing properties of the leather.

1. Retanning of leather for bovine pale colours shoe upper.

Dosage on shaved weight.

Wash as usual
Then neutralizing and retanning as follows:

80.0% water at 35 º C.
  1.5% TRUPOTAN NS
15' and add
  2.0% TRUPON PEM
20' and add
                     6 to 8% TRUPOTAN 2BL
60'

Proceed to wash, dye and fatliquor as usual.

2. Retanning of leather for bovine white shoe upper.

Dosage on shaved weight.

After neutralising as ususal to pH 4.5 - 5.0.
Fatliquor and retann as follows:

150.0% water at 50 ° C.
    3.0% TRUPOSYL TBD
    3.0% TRUPOSYL HBD
    2.0% TRUPONIL WHITE E
    0.3% TRUPOTAN DAR
                                    45'and add
    3.0% TRUPOTAN R-83
  15' and add
    3.0% TRUPOTAN 2BL
    1.0% TRUPONIL WHITE E
    0.2% TRUPOTAN DAR
  20' and add
    1-2% SOLVOTAN
  10'
Wash and horse up

Storage stability: This product can be stored for up to one year, if temperatures below 5 °C and above 40 °C can be avoided.