How is a
compressed cardboard is prepared?

At the plant, layers of kraft paper are crimped and glued to form corrugated cardboard, which is then cut, printed, folded, and glued to make boxes. At the beginning of this process, kraft rolls from the paper mill are loaded into a huge machine called a corrugator.

this is more of a statement than a question. is there answers to go along with this, or is it opinion based?

if you know your abc's you should be able to get your answer or just use google