90 grams of rice yellow parchment

Parchment is a material or provide written books. Best known as vellum parchment vellum, often make use of the most important books on the copy. Parchment, also known as industrial parchment, is a translucent wrapping paper, it is mainly for the packaging machine parts, instrumentation, chemical medicines. Manufacturing is the main raw material for chemical pulp and parchment rag pulp, the raw material copied into sheets and then into 72% concentrated sulfuric acid bath for several minutes, this procedure is called "parchment" effect. Parchment is characterized by a compact, strong anti-oil, water, wet strength, airtight, good elasticity, the paper through the sheepskin, it also has a high strength and a certain degree of folding. It can be used as a semi-permeable membrane.