The earliest known example of a stencil dates back to 35,000 to 40,000 BCE, in the Stone Age (Paleolithic), and consisted of the direct use of human hands to represent symbols on cave walls by blowing pigment onto them. From there evolved the stencil technique, corresponding to the reproduction of a symbol by applying ink through a cutout, which began with cutting out tree leaves and fruit peels combined with natural dyes, progressing to a diversity of materials and methods as the characteristic development of each era and location developed. Much later, this technique derived an essentially simple printing process with a long and…