Rubini is obtained from elderberry juice: by using special membranes, water and a small part of sugar, fruit acid and minerals are separated from the resulting juices while all macromolecular substances like aroma, colour, amino acids, polyphenols and partly other medium-sized substances such as sugar, fruit acid and minerals are concentrated. 
 
The production of RUBINI is based on a purely mechanical method: during the production cycle no chemical process occurs, no foreign substances are added and no change in the molecular structure and in the configuration occurs.
Rubini is therefore a product of purely natural origin, which can be defined a "fruit concentrate".