How does the quartz tube distinguish between good and bad?

   One: smell a very natural stone flavor, smell the smell of quartz stone production process by adding formaldehyde-containing glue, good quartz tube are environmentally friendly materials produced. The output of the plate has a very strong formaldehyde flavor, this quartz tube offer and then can not choose the cheap ah, harm life!

   Two: the pores are not good quartz tube, the surface is not a stomata.

   Three: not obvious for the good product, splicing at the gap.

   Four: scratches deep and obviously for the unqualified, the key may pen pen knife plan.

   Five: simple drop stone powder for the unqualified, 200 mesh sandpaper sanding.

   Six: there are cut off the mouth of those who failed, cut the surface along the edge.