There was also a merger with the Neumann and Staebe glass company from Hermsdorf / Kynast. In 1918 the Josephinenhütte of the Reich Count Schaffgotsch bought the Heckert company from the neighboring Schreiberhau.
From 1911 it traded as Fritz Heckert - Petersdorfer Glashütte KG. In 1910 Heinrich von Loesch, chamberlain and manor owner on Kammerswaldau, acquired the Heckert company. His widow, then a son-in-law and, from 1905, his son Bruno Heckert continued the company. In 1862 he acquired a glass grinding shop, the so-called Felsenmühle am Zacken near Petersdorf on the edge of the Giant Mountains In 1866 he founded his glass refinery in Petersdorf, which he was able to expand into a major glass processing company with at times 200 employees, which from 1889 also had a glassworks. There he learned the trade of a businessman and described himself as a manufacturer from 1863. After his father's death, at the age of 15, he went to Berlin to see his brother Carl Ferdinand. Seven of the nine siblings worked in the glass industry. Fritz Heckert was born in 1837 as the eighth son of the master glazier Johann Andreas Heckert (1789-1852) in Halle an der Saale.
