To develop a technology for making tetramethylammonium hydroxide concentrate, we have chosen a direction of research including a membrane electrolysis of a tetramethylammonium chloride solution. Based on the research, an experimental production of a tetramethylammonium hydroxide solution with a concentration of at least 20 % and a PP-051MS nonmetallic developer corresponding to the technical specifications of TU 2638-083-05784466-2015 and TU 2496-085-05784466-2015 has been created.