A calender machine is a series of pressure rollers used to smooth and finish paper surfaces. It is typically one of the final stages in the papermaking process, improving the paper’s texture, gloss, and uniform thickness.

Calendering enhances the surface quality of paper by making it smoother, glossier, and more uniform. It also improves printability and overall product quality by controlling thickness and density.

Common types include soft-nip calenders, hard-nip calenders, and supercalenders. Each type is designed for specific finishing requirements, such as achieving higher gloss, better thickness uniformity, or improved surface smoothness.

Calenders play a crucial role in determining the final appearance and quality of paper. By applying controlled pressure and heat, they improve smoothness, reduce surface roughness, and ensure consistent thickness, which is essential for printing and packaging applications.