This kind of stone "black seam" is originally "bleeding"!
Source:The SiteAdd Time:2019/6/18 Click:0
Stone black seam is a problem often encountered by stone caregivers. The black seam cleaning should not be blind. Judging the cause is the key.
There are three main reasons for the black seam of stone:
1, gap pollution
Among them, the phenomenon of osmosis is the most easily overlooked. Few people think that the phenomenon that the stone is black along the gap is actually osmosis.