Xuan writing brush Xuan writing brush Xuan writing brush or Xuanbi (), is a type of ink brush made in Anhui Province, China. Xuan brushes are often mentioned together with the famous Xuan paper - a kind of writing paper (rice-paper). The ink brushes are normally made in Jingxian County (currently Jing County) of Anhui Province. In ancient times, Jingxian County was under the jurisdiction of Xuanzhou Prefecture (宣州府; Xuān-Zhōu Fǔ; currently Xuancheng), so its name bears the character "Xuan" (Xuān). The Xuan brushes gained popularity in Jin Dynasty (256-420) among classic scholars, governmental officials, calligraphists and painters. During the Tang Dynasty (618-907)
Red rosin paper Red rosin paper Red rosin paper (red building paper, brown rosin paper, slip sheet paper, rosin-sized sheathing paper, and building paper) is a 100% recycled heavy duty felt paper used in construction such as underlayment under flooring and siding. The name "rosin-sized sheathing paper", commonly used to describe the material, comes from the rosin used in the paper, the process of sizing it to add the rosin, and its use by builders. "Alum-rosin size was invented by Moritz Friedrich Illig in Germany in 1807..." and is known to have been used as a building paper by 1850. In building construction