They can be used on any base that needs coloring. A remarkable range of colors can be created by mixing different salts together. And softer shades of any color can be created by mixing the salts with water. The salts can be applied by aerograph, disk or silk screen.
Using Ferro's Soluble Salts:
Ferro's soluble salts are designed for decorating body masses that contain organic-metallic complexes. The inorganic salts are replaced by organic complexes such as tartrate, oxalate and citrate. During the combustion process, these complexes produce carbon dioxide, water and oxide mofori (MOx), which are responsible for coloring the body.
For best results, it is important to maintain accurate control of the process and regulation of all the instruments and equipment needed to make the finished product-from the body mass and the spray dryer to the press, the dryer and the glazing lines right up to the kiln.
Body mass is an important factor to control because the permeability, homogeneity and constancy of the body all affect the ability of the salts to penetrate the body.
Uniform pressing is a critical quality control factor, because differences in pressing, caused by incorrect loading, humidity or grain size, create differences in compactness and the subsequent permeability.
Controlling the drying process in order to have the leather, hard mass arrive at the salt application stage with a uniform temperature between 45° and 60° C reduces the variation in shading caused by dishomogenous absorption.