Trivia - Why do we have to use black and blue when writing?
Jas
▋Frequent Facts about Writing Colors Have you ever thought about why you have to use black or blue when writing? The earliest synthetic dyes that appeared were purple and blue. Therefore, it is inferred that among writing colors, blue and black are relatively easy to produce in large quantities, relatively resistant to fading, and acceptable. ▋Ink black and carbon black have been used for formal documents for a long time in history. For example, in Japan, black will give people a formal feeling, so when signing, most stores will directly provide black pens. ▋The history of black Ink black and carbon black have been used for a long time in history, both in the East and the West. For example, iron gall ink was widely used on parchment in ancient times, and the handwriting turned black after oxidation. In the East, calligraphy ink sticks are mainly black. So in Japan, black will
