Writing and drawing with expired ink will be smudged, which will affect the calligraphy effect. So calligraphers generally don't store ink, but collect Mo Ding. Mo Ding is characterized by stability, which can last for decades or even longer. However, the ink quality of Yidege is good, and the ink that has not been opened for more than ten years is still very good. Some brand inks with good quality have a longer storage life.
Extended data:
The ink on squid is completely different from the black ink used for writing. The melanin contained in the "ink" made by squid is a kind of protein, which will decompose after a long time. Squid ink was originally used to stop bleeding. Since the 1990s, cuttlefish ink has attracted wide attention because of its highly effective anti-tumor activity and outstanding immune enhancement function.
And it has become the main raw material of Japanese health food. Squid has the characteristics of high nutrition, short life cycle (usually one year), fast growth and wide distribution. It is a kind of marine aquaculture species with great development prospects and the largest and most potential resource in protein.
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