In 1759, Oberkampf proposed a partnership with the Swiss for the creation of a manufacture of cottons printed with engraved wood boards in Jouy-in-Josas.
In 1770, Oberkampf who had then lived in France for ten years, was made a naturalised French citizen, along with his brother.
Around this period, an important technical evolution enabled his company to considerably increase its production: the wooden boards were replaced with copper plates, also engraved, but flexible and able to be fixed on cylindrical drums.
In 1785 Oberkampf invented the first machine for printing wallpaper, and shortly afterwards, Louis-Nicolas Robert designed a process for manufacturing endless rolls of wall-paper.
In 1806, Oberkampf won a gold medal at the industrial fair of the Louvre for its eminent role in the manufacture of printed toiles.