Lacquer: A clear resin/solvent coating, usually glossy, applied to a printed sheet for protection or appearance.
Lamination: A thin film coating which is applied to the paper or board to give a more glossy or matt appearance.
Layout File: The file created by computer application software which contains all the imported elements and where all the design and layout of a document are performed.
Letterpress: A method of printing where the wrong-reading raised surface of a printing plate is inked and impressed directly onto the paper. There are four types of letterpress presses; platen, flatbed cylinder, rotary and belt.
Lines per Inch (lpi): refers to the quality of a halftone screen. It is important to distinguish it from dpi which refers to the resolution of a device or image. Commonly lpi is used at exactly half of the dpi of the device or image, i.e. 300dpi would equal 150lpi.
Lithographic Printing: A printing process based on the principle of the natural aversion of water to grease. The areas to be printed receive and transfer ink to the paper, the non-printing areas are treated with water to repel the ink.