Secret and Now Freely Disclosed Experimental Secrets

Preface.

most esteemed reader will also find revealed here the secret of making the true, genuine, and finest carmine A vivid red pigment historically derived from the cochineal insect.; to say nothing of ultramarine An extremely expensive blue pigment made from ground lapis lazuli; at the time, it was often more valuable than gold., which is described here in a way that allows it to be brought to a very fine state. The clearest concepts and trials for making the most beautiful glazes are given, from which thorough description potters and other artists can promise themselves much pleasure and great benefit. The composition of stones This refers to the creation of "paste" or "strass"—high-quality lead glass used to simulate diamonds and other colored gemstones. is described in the clearest detail, including all the specific circumstances and necessary manual techniques. Everyone knows how many have acquired a considerable fortune through this science in Bohemia A region in the modern-day Czech Republic that was the historical center of the European glass and decorative stone industry. and other kingdoms and places. In some cities, there are as many as 300 gem-cutters original: "Steinschneider." Artisans skilled in the lapidary arts of cutting and polishing precious and semi-precious stones., who have made this art of cutting and polishing stones wealthy and famous throughout the whole world. I flatter myself that I am performing a pleasant service for my most esteemed readers with these and other useful experiments detailed in this treatiseoriginal German: "Tractate", and I promise that if these, for now clearly