Dictionary paper is a high-quality thin type of paper specifically used for printing reference books. It features thinness, strength, toughness and strong folding endurance. Its paper surface is white and fine, with a tight and smooth texture, presenting a slight transparency and water resistance. It is mainly used for printing publications such as dictionaries and handbooks that require both portability and durability. This paper has strict requirements for the printing process. It is necessary to precisely control the pressure and ink concentration to avoid overprinting or blurring. Some literature records that it originated from the historical background of being used in the UK for printing the Bible, and thus it is also called "Bible paper".