But offsetting this liability is that it grows more beautiful with age. This is due to two factors: One, it absorbs the sesame seed oil in the ink; and two as its surface is rubbed over the years, it becomes glossier and thus, more beautiful.
雞血石印章使用年份愈久，石色愈見光潤鮮豔：一方面因印泥中含蓖麻子油會浸滲石中，改變石質；另方面經常撫摸、把玩，亦能使雞血石光滑亮麗，色澤更美。