Folding gluing machines are used to produce finished products such as a promotional item, envelope, box, or case out of a piece of flat material. They fold the blank along pre-creased lines and apply an adhesive to hold the product together. They can process a broad array of materials including corrugated boards, micro-flutes, litho-laminates, metalized and varnished boards, plastics, and solid boards. The packaging industry is observed to mainly adopt folding gluing machines for the transformation of flat blanks into multi-point, crash-lock bottom, or straight-line boxes. Folding gluing machines are also used in other businesses including commercial printing and envelope manufacturing.