 Soon afterwards, Troplowitz expanded the company into selling brand-name merchandise as well.Under Troplowitz's ownership, the company developed several of its own products, including Nivea, Leukoplast, Labello, and a pressure-sensitive tape that would later be known as "Tesafilm".As did Paul Beiersdorf, Troplowitz maintained a close business relationship with dermatologist Paul Gerson Unna (1850–1929).