printing types
1.The features, colorpaste,compositions and print- ing processes of 26 special printing techniques are detailed in this paper. These printing techniques are divided into 6 types: conventional special printing, three-dimention printing, lac- quer printing, pearl printing, colour-changing printing and other new types special printing.
2.The features, colorpaste compositions and printing processes of 26 special printing techniques of our and other countries are detailed in this paper. These printing techniques are divided into 6 types: 1, conventional special printing 2, theree-dimentional printing 3, lacquer printing 4, pearl printing 5, colour-changing printing and 6, other new types special printing, these informations state are relatively systematic and complete, and can be used as references for the development of our textile special printing new oroducts.
3.Printing originated in China. In the period between the Sui Dynasty in the second half of the 6th century and the Tang Dynasty in the first half of the early 7th century, lithographic printing was invented and, in the 9th century, a large number of books began to be printed by the lithographic process. In the reign of Emperor Qingli of the Northern Song Dynasty (960 A.D.-1127 A.D.), a common fellow named Bi Sheng invented printing by movable type and started to use baked clay types for printing. The technology was introduced to other countries in about the mid-8th century.
5.This paper describes the decolorizing experiment using the coagulation method to treat printing ink wastewater with a bluish purple color,pH value between4.5～6.5,COD of 6000～17000/mg·L -1 ,chroma of 100～350,and SS of 200～6500/mg·L -1 .The technological conditions,such as the types of coagulants and their dosages,the pH value,and the types of coagulation aid and their dosage,are optimized.
