What are the characteristics of printing and dyeing process in Qing Dynasty?

The printing and dyeing process in Qing Dynasty was very developed. Only from the perspective of color, different places have different characteristics, such as sky blue in Jiangning and Yuan Qing. Suzhou's sky blue, sapphire blue, Erlan, and onion blue; Cinnabar and sauce purple in Zhenjiang; Lake color, light green, snow green, jade color and big green in Hangzhou; Chengdu's bright red, light red, valley yellow, goose yellow, bronze and so on. Among them, the best dyeing is in Jiangsu and Zhejiang provinces. In printing technology, medical patch is the most popular and developed. According to Kangxi's "Songjiang Fuzhi", "Medicinal patch cloth, commonly known as flower watering cloth, has been everywhere in recent years." Changzhou government records in the Qing Dynasty described this in detail. "There are two ways to water flowers and dye cloth: using gray powder mixed with alum as a pattern, and then adding color according to the author's intention. After drying, scraping off the gray powder, a bright white pattern appears, which is called scratch printing. Or carve flowers, figures, birds and animals with wooden boards, cover them with cloth, and rub them with various dyes to make them look like paintings. Call it the brush printing method. " The so-called scratch printing method is the printing method of blue printed cloth.