Supercalenders are machines that make paper very smooth and shiny.
Supercalenders are important in making high-quality paper.
Examples:
The supercalenders make the paper shiny.
The supercalenders are big machines.
We use supercalenders to make the paper smooth.
The supercalenders work very hard.
The supercalenders make the paper look like glass.
The supercalenders are very expensive machines.