Corrugated paper comes in two forms, lined and unlined.Lined corrugated paper is rigid layered paper[paper?:paper sample maker cutting machine] that encloses a fluted layer between one or two smooth “liner”layers. The fluted layer provides added strength. Paper we know as cardboard is actually lined corrugated paper[corrugated paper?:DCP-H series sample cutter plotter]. Unlined corrugated paper consists of the fluted layer only and is flexible.
Unlined corrugated paper is usually used for protecting delicate materials during shipping or for decoration. Unlined corrugated paper was the first type of corrugated paper invented in the late 1800s for use in shipping hurricane lamps. Decorative unlined corrugated paper comes in many bright colors and is most commonly found bordering the bulletin boards of institutions like schools and hospitals.
