Supercalendered means to make paper very smooth and shiny by pressing it between rollers.
Supercalendered paper is often used for things like magazines and catalogs.
Examples:
The supercalendered paper is very shiny.
I like the feel of supercalendered paper.
Supercalendered paper is used for magazines.
The supercalendered paper is so shiny, it's like a mirror!
The supercalendered paper is the shiniest paper in the world.
I want to touch the supercalendered paper because it's so smooth.