Christian D. Markmann GmbH
Leadership in Vegetable Tannins since 1983
Special Extract Types
VALONEA Extract...........................................................................................................
Being a tannin of the pyrogallol group, VALONEA-extract tanned leather is stable to the effects of light. VALONEA is of value chiefly in the production of high-grade heavy leather, where weight and water-resistance are important. VALONEA is giving “bloom” to the leather and causing it to be dense and heavy.
SUMAC Extract................................................................................................................
SUMAC gives a good suppleness, and produces a leather with pastel shade. Due to its soft character, it is appropriated for the retannage of goatskins and gives a fine grain. SUMAC is a excellent mordant for the dyeing in pale shade. It is also a great auxiliary of dying at the end of the retannage, for getting levelled dyeing.
GAMBIER Extract............................................................................................................
GAMBIER combines rapidly with the proteins of the skin, in order to produce supple tannage, softer touch and fine grain. Due to the swelling property, GAMBIER is particularly suitable for the retannage of leathers and skins, which are too flat and too firm. At the end of the tannage, GAMBIER acts as a levelling agent without affecting the dyeing intensity.
If you need any other special vegetable tanning extract, please let us know,
we surely can be of help for you.
Valonea Cups
Tanning Materials
TARA - Powder................................................................................................................
TARA powder is obtained by grinding the Tara pods, without any further chemically treatment, and has a light beige colour. TARA powder can be used both in the retanning of chrome tanned leathers, and in vegetable self-tannage. The main advantage of TARA powder over the vegetable tannins normally used, is its much better lightfastness.
Valonea Cups...................................................................................................................
Mainly used in the pit-tannage of heavy leathers.
If you need any further special vegetable tanning material, please let us know,
we surely can be of help for you.
If you need more detailed information, do not hesitate to contact us.
The suggestions and recommendations are based on our experience, but do not constitute a warranty from our part.