With the deepening of calligraphy practice, you can gradually use copybooks with poor permeability to give yourself some room to play.
The copy layer of transparent paper is called sulfuric acid paper, copy paper, rubbing paper, copying paper and transparent paper, which are called differently in different places.
Transparent synthetic paper can be made by adding acrylic resin to pulp during papermaking.
Pro is written or drawn according to the original work; Imitation is to write or draw on the original with thin paper (silk). Broadly speaking, copying is not necessarily the original, but also a monument, post, etc. In order to learn skills, copying focuses on the process of copying. Replicas obtained for preservation, restoration, exhibition and sale, focusing on the results of reproduction.