The historical development and technical secrets of blueprint cloth production were described as early as 1954 by Josef Vydra, a renowned ethnographer and employee of the Centre for Folk Art Production (ÚĽUV), in his book Ľudová modrotlač na Slovensku (Folk Blueprint in Slovakia). In it, he speaks about the historical development of the use of indigo to dye cloths, throughout the world, Europe and in Slovakia. In Slovakia, blueprint cloth became popular among wide sections of the population at the end of the 18th century, especially in small towns. From there it penetrated into the countryside, where blueprint craftsmen began to...