Also used for boiler water treatment, fade-resistant ceramic products, rayon of extinction, the fabric and mordants such as tanning.
还用于锅炉水的处理、陶瓷制品防褪色、人造丝的消光剂，织物媒染剂和鞣革等。
2
Solid like jade, black like coal, and fade-resistant, non-dispersing and strongly fragrant, it is an indispensable writing instrument for calligraphers and painters.
坚如玉、黑如漆、不褪色、不散化、味芳香，它是书法家和画家不可缺少的书写工具。
3
Size: the right size very comfortable good quality do not fade service very good fit does not fade durable wear-resistant decorum also generous.