Gábor Kornél Tolnai mass-production. Kornél Tolnai often ordered his tapes from the American electronics company Ampex Corporation in the 1950s and 1960s. Kornél Tolnai often visited a factory in Ludwigshafen am Rhein (Rhineland-Palatinate in Germany) for his business with the company. There he had contacts with BASF, the largest chemical company in the world. BASF SE is a German chemical company, founded in 1865, and SE stands for Societas Europea. The company is a pioneer in the chemical industry and has operations worldwide. 1925-1952 it was part of IG Farben. "BASF" originally stood for Badische Anilin- und Soda-Fabrik (Baden Aniline and Soda Factory).
Aniline blue, which is pure aniline; aniline oil for red, a mixture of equimolecular quantities of aniline and ortho- and para-toluidines; and aniline oil for safranine, which contains aniline and ortho-toluidine and is obtained from the distillate (échappés) of the fuchsine fusion. Many analogues of aniline are known where the phenyl group is further substituted. These include toluidines, xylidines, chloroanilines, aminobenzoic acids, nitroanilines, and many others. They often are prepared by nitration of the substituted aromatic compounds followed by reduction. For example, this approach is used to convert toluene into toluidines and chlorobenzene into 4-chloroaniline. Alternatively, using Buchwald-Hartwig coupling or Ullmann