Cooper Hewitt says...
Jacob ("Jac.") Jongert was a Dutch graphic designer born in Wormer in 1883. He trained in Amsterdam at the the National School of Applied Arts, and as a young man worked as an assistant to Richard Roland Holst, a proponent of the Arts and Crafts style in the Netherlands. Early in the second decade of the twentieth century, Jongert began to move away from the more elaborate, refined qualities that characterize Holst's work, adopting instead a plainer, more geometric style reflective of the modernist avant-garde. Jongert explored the relationship between art and industry, building distinctive graphic identities for Dutch companies, especially the Van Nelle beverage company, for whom he was the primary designer for nearly two decades. In 1918 he was appointed Head of Decorative and Industrial Arts at the Rotterdam Academy (where he would be an important influence on a young Willem de Kooning), and he was an early member of the Rotterdam Opbouw (Advancement) Association, a group of artists and architects who sought to promote social progress through design reform. Jongert died in Reeuwijk in 1942.
See:
Mienke Simon Thomas, Goed in vorm: honderd jaar ontwerpen in Nederland (Rotterdam: 010, 2008), esp. 91-92.
Mienke Simon Thomas, Wilma van Giersbergen, et. al, 'Proeven is koopen,' Jac. Jongert, 1883-1942 (exh. cat.), (Rotterdam: Museum Boijmans van Beuningen, 2009)
