Salt stains on shoes and boots

On leather shoes and other leather objects, sometimes salt stains and lines occure. For shoes, this is typical in the winter time.

Several causes can be considered for the formation of salt lines, although the reasons have not yet been investigated:

One reason could be salts or other minerals, which are introduced into the leather in the tannery. Salts are used for the preservation of leather before tanning. In the tanning process itself, salts are also used to fill the leather and to loosen the fibres.
One reason might be salt on roads in the winter time. The leather becomes wet by the salt-soaked snow and when drying, salt stains and lines become visible.
Sweat also contains minerals and salts and can promote salt stains.

In winter, several sources promote salt stains on shoes. Salts in the leather by the production, the perspiration of the feet, which is absorbed by the leather over a longer period of time, the salt on streets angainst ice and snow and the overall damp weather, which makes the leather soaking moisture.

Salted rawhide in the tannery.

The cleaning is uncomplicated because salts are water-soluble and can be cleaned of or washed out with leather cleaner or a leather washing detergent.

Salt lines on a leather bag where mineral water has run out. Sweat and salt of winter roads can be excluded as cause. The salt must come from the tanning process.