A mathematical model is developed to understand the heal transler characteristin ofa chill roll assembly used in the heat-set web-oflset printing industry. Thechill roll assembly permils the waling olpaper after the paper has undergone drying in an oven to allow for hardening of the ink The heat transfer is modelled and solved using a series expansion. The heat conducted from the paper at each roll is calculated from this, as well a temperature distribution through the paper and around the roll. The resulls are compared with a real system and the resulling error is found to be of the order of 5%.