Pure quartz | Kai Sa Building Materials (certified) | quartz provided by Kai Sa Building Materials Co., Ltd., Dongguan City. Building Materials Co., Ltd., Dongguan City, Kai Sa (www.kaisa-stone.com) is specialized in the "stone, precast concrete," the enterprise, the company of "honesty, hard service" concept, to provide you with the highest quality products and services . Welcome to inquire! Contact: Mr. Hu. Building Materials Co., Ltd., Dongguan City, Kai Sa Features 1), easy to scratch: quartz plate vibration through the vacuum compression molding extrusion monochrome quartz, has reached the Mohs hardness of 6 to 7.5, (Austrian mineralogist Mount s (Frederich Mohs) the creation of a hardness scale, is an internationally recognized method of hardness testing quartz, 10 is the highest hardness, diamond is 10) steel ball hard is unable to scratch, abrasion, is on the market any kind of countertop materials are incomparable advantages. Quartz hardness and wear resistance are more superior to acrylic stone, good heat resistance. Whether acrylic or quartz stone quartz stone Dongguan You can not use the hot pan directly on the table, such as kettles, instantaneous temperature difference will cause the two materials to produce localized thermal expansion and contraction, it would be the local internal stress occurs produce large changes burst. Whether acrylic or quartz stone, if you do not use pot holders, can not be placed directly on the countertop hot objects. And the course of time, the area in contact with hot objects will light some of the other land areas and will produce light-colored countertop color difference.