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CHEMIPOL company products >> Retanning and Dyeing

CHEMITAN A

Characteristic:
Composition:
Aromatic Sulphonic Acid Condensates
Appearance:
Yellow Powder
Concentration:
Approx. 96%
Charge:
Anionic
pH (1:10 solution):
3.5-4.0
Solubility:
Readily soluble in water
Light fastness:
Good


Properties:

CHEMITAN A

  • When rich dyeing with good softness is required CHEMITAN A is the ideal choice. The product does not bleach the shade as much as Conventional Syntans do.  Its low astrigency and mild tanning action produces leathers with medium fullness, good softness and very good light fastness.

  • CHEMITAN A disperses vegetable tannins deeper and more evenly into the leather. CHEMITAN A  is perfectly compatible with chrome tanning agents, combination tanning agents, anionic dyes and other auxiliaries that are usually used during the retannage.

  • The product is fairly lightfast, non-yellowing and heat resistant. CHEMITAN A  is specially recommended for full grain soft leathers like garment and upholstery leather or Nubuck, Suede etc., where dye brilliancy and clear shades are of utmost importance.

Application metod:

CHEMITAN A

  • CHEMITAN A is preferably added to the retanning drum in undissolved state.
    It's compatibility to chrome tanning agents makes it possible to use CHEMITAN A even during rechroming operation. This results in better and even distribution of chrome throughout the thickness of the leather and since it precedes the chrome, a milder and mellower tannage occurs resulting in increased softness.

  • During retannage, CHEMITAN A can either be added to the spent neutralization bath or a fresh retanning bath, alone or in combination with vegetable tannins, resin tanning materials, or other syntans, as required. It is advisable to use vegetable tanning materials and/or resin tanning agent where stronger filling is required. However, when full and brilliant dyeing is desired, a purely synthetic retannage with CHEMITAN A is preferable.

Storage stability:

When stored in a dry place, the storage period of the product is unlimited. Warehousing in damp, warm place can lead to solidification, which will not influence the product.

 

The information included in this technical leaflet is based upon our knowledge and experience of the product used. The stability of the products mentioned to obtain specific properties or effects are given without obligation or guarantee and should be fully tested by the end user and adopted to suit prevailing works conditions or other products which may be employed

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