evidence: The product is created by pounding silver into very thin foil sheets that are backed by paper. It must be handled delicately as even a light touch can cause it to break and crumble. Although it is supposed to be made with at least 99.9 percent silver, which is even more pure than sterling silver, a number of kinds of varak have been found to be far less pure, mixed with other types of metals such as aluminum or even cadmium. Many vegetarians believe that varak is not suitable for their diets because there is speculation that the process of making the silver foil includes the use of animal products.