Blue print paper and preparation method thereof

Abstract

The invention provides blue print paper and a preparation method thereof. The blue print paper comprises the following ingredients: bleached chemical softwood pulp, bleached chemical hardwood pulp and mechanical wood pulp; the blue print paper consists of a surface layer and a bottom layer; the surface layer adopts the fiber proportion in part by weight: 30 percent of bleached chemical softwood pulp, 45 percent of bleached chemical hardwood pulp and 25 percent of mechanical wood pulp; the bottom layer adopts the fiber proportion in part by weight: 30 percent of bleached chemical softwood pulp, 25 percent of bleached chemical hardwood pulp and 45 percent of mechanical wood pulp; the blue print paper has the characteristics of convenience for use, clear pattern, durability and low cost.

Description

technical field [0001] The invention relates to a blueprint paper and a preparation method thereof. Background technique [0002] Blueprints, commonly known as blueprints, are mainly used to reproduce engineering drawings and documents. Also known as "blue paper" in Hong Kong and Macao, the surface is coated with photosensitive paint composed of diazonium salts and coupling agents. When engineering drawings, blue paper needs to be used for original drawing, printing and fumigation. After the material is developed, it produces a blue-and-purple printing effect, so it is called "blueprint paper". Due to the defects in the production process of traditional blueprint paper, the quality of the paper produced is not good. When used, not only the pattern is not clear enough, but also it is easy to age and fade. As people's requirements for paper quality are getting higher and higher, the blueprint paper in the past It also gradually lost public recognition. Contents of the inve...

AI Technical Summary

Problems solved by technology

Due to the defects in the production process of traditional blueprint paper, the quality of the paper produced is not good. When used, not only the pattern is not clear enough, but also it is easy to age and fade. As people's requirements for paper quality are getting higher and higher, the blueprint paper in the past gradually lost public recognition.