1. The advantage of Song Yanmo's writing is that the ink color is light but not light, and it is vast and quaint, and the ink output speed is relatively fast, but the water resistance is poor. Therefore, the work should be left for a long time after completion, and then mounted when it is dry, otherwise it will be easy to run out of ink; The advantage of oil, salt and ink writing is that it is dark, bright and light, and it is more suitable for calligraphy creation, especially for writing Erwangxingshu, Xiaocaoshu, Zhong Kai and Xiaozhuan.
2. Song Yanmo and You Yanmo are suitable for calligraphy creation because the black carbon evaporated after the burning of petroleum fuel contains lipid components, so the grinding mouth is shiny and the handwriting after writing is shiny.