After coloring the soil-contained paper, it not only becomes resistant to insect damage and increases the ability of concealment, but also becomes more durable for longer life without turning yellow from light and in fact becomes more beautiful and has a smoother surface over time.
泥土を混入して着色すると、虫害に強く紙の隠蔽性が向上するとともに、日焼けせず長期間の保存に耐える耐候性が向上し、紙の肌がきめ細かくしっとりとした風合いがでる。