Quartz Process III: polishing, cutting 12, negative cast: Positive polishing is completed by the automatic production line of automatic flip reverses then transferred to within the 2nd polishing line, then the reverse side polishing of about 13 to 15 minutes. 13, classification: quartz stone polishing process after completion, the automatic production line conveyor to the position of artificial graded quartz plate, quartz stone graded visually by hand, our current products are divided into A-level board (Hons board), Level B board (flawed quartz, such as surface with impurities, needle, porosity, color, etc., after cutting or patching normal use), waste plates (can not be used, discarded boards). How to identify quartz stone quartz stone is good or bad four, the standard authentication quartz stone as identification standard quartz stone: 7, acid: with 3% hydrochloric acid solution or 100g / L citric acid solution, 30g / L hydroxide sodium or potassium hydroxide solution etched surface, the surface without visible change. Kai Kai Sa Sa quartz _ _ quartz stone building materials provided by the Dongguan City Kai Sa Building Materials Co., Ltd. Dongguan Kai Sa Building Materials Co. (www.kaisa-stone.com) quality of service and products, continue to receive the recognition and trust of new and old customers and the industry. Our company is a certified member of the whole alliance network operators, business alliance customer service icon on the page, you can talk directly with our customer service staff, to our future cooperation happy!