SELKA İç ve DıŞ Ticaret A.Ş. is Kartonsan’s largest supporter in the marketing of customized products.
Kartonsan is a shareholder of SELKA with a 99.37% stake and provides logistics support to Kartonsan with its storage facility in Sefaköy, İstanbul.
In 2015, SELKA İç ve DıŞ Ticaret A.Ş. undertook an investment in a shearing machine and began to offer a higher quality service to its customers, doubling its production capacity. The shearing machine holds the specification to gauge cuts from the coil.