Blach served as managing director of the General Trading Company from 1767.
[2] After Blach's death in 1767, the company was continued by his son, Christen Schaarup Black (1737-1783).
The company was from then on registered as C. S. Blacks Enke & Co. Erich Erichsen was for a while in partnership with his brother, Peter Erichsen, who was married to Peter Applebye's granddaughter, Anna Agathe Nancy.
Trade on the Danish West Indies was still the central part of the company's activities.
Erichsen was, for a while, a member of the board of directors of the Danish Asiatic Company.