Traditional Filter Paper: Unique Paper Production Technology with Air Drying and "Crepe on Both Sides". In standard paper production, the paper is dried with a heated roller, and in this process, the crepe layer on one side of the paper, which provides height, is pressed. On the other hand, CAFEC papers are subjected to a drying process with compressed hot air instead of pressing in the standard process. This maintains the height of the crepes on both sides. Thanks to the balanced height of the crepes on both sides, almost all ground coffee particles adhere to the crepe. This allows you to enjoy a clean-tasting coffee without any muddiness. Furthermore, the crepe on both sides ensures a smooth flow of water.