Every now and then we dive deeper into the details of paper making by highlighting a certain part of the process. This time we are focusing on calendering, which is one of the crucial steps in achieving Multicopy’s excellent print results.
Calendering is the process by which the paper’s surface is altered to achieve a smooth finish – improving its printability properties. If not calendered, many printing papers simply wouldn’t measure up to the required printing quality. Our uncoated grades, like the office papers in the Multicopy family, manufactured at Nymölla Mill, are treated through a soft nip calendering process.
The soft calendering machine uses heat, pressure and friction to produce the required result as the paper web is pressed through two “rolling” nips. These soft rolls have an elastic cover that form a nip, replicating the surface of the tempered roll with a hard surface – that is where the smoothness is created.
The machine used for calendering Multicopy at Nymölla Mill is a Valmet Optisoft calander. Link to Valmet
Humans’ urge to communicate has always been strong – and with the evolution of paper, the written form of communicating opened a whole new world of efficiency, suddenly dismantling geographical boundaries. Naturally, the history of papermaking is closely connected to societal, industrial, and cultural events.
Eco-awareness and higher demands on sustainability features among customers tend to lead to good things. One current example is the initiated project at Stora Enso to certify all paper pulp grades as compostable, to helps consumers make more eco-friendly choices.
In 2021, the Multicopy production base in Nymölla mill took a step further in the fossil free journey, with Stora Enso entering a partnership with energy company Gasum. We had a talk with Erik Woode, Director, Project Development & Execution, at Gasum, to get a status update after one year of turning residue water from production into fossil free fuel.