Built on experience. Scaling through capacity.

The Paper division reflects a legacy of industrial strength shaped by responsibility, consistency, and a clear long-term vision.

Umka Cardboard Mill, a trusted name in recycled cardboard production. For over 80 years, Umka has been a trusted supplier to partners across Europe. It is a part of Kappa Star Group since 2003, driving continuous growth and modernization within the Group’s industrial portfolio.

Our companies

Founded in 1939, Umka is one of the leading producers of white-lined chipboard in Southeast Europe. With an annual capacity of 220,000 tonnes, its portfolio includes five product grades tailored for diverse industries.

Umka operates using 100% recycled wastepaper, making it Serbia’s largest wastepaper recycler. Its products are used in packaging for food, cosmetics, pharmaceuticals, and other demanding applications.