Quartz stone is probably well-known to everyone, as it dominates cabinet countertops with advantages such as wear resistance, scratch resistance, high temperature resistance, penetration resistance, non-toxic, and radiation free. With the continuous maturity of production technology by quartz stone manufacturers, the output is also constantly increasing. Quartz stone has also been comprehensively developed from a favored tabletop to decorative stone, and is now more commonly used in floors and walls. Quartz stone belongs to a brand new artificial stone, which is also artificially synthesized.

      The raw materials for the production of quartz stone boards are synthesized from quartz sand, resin, curing agent, coupling agent, and natural pigment, with the content of quartz sand alone accounting for over 93%. Those who are very familiar with quartz stone know that quartz sand can be divided into two types: acid washed sand and ordinary sand. What are the advantages of acid washed sand? Acid washed quartz sand, also known as refined quartz sand, has SiO2 ≥ 99-99.5% Fe2O3 ≤ 0.02-0.015%. Acid washing involves soaking the carrier in 6mol/L hydrochloric acid for 2 hours or heating it with concentrated hydrochloric acid for 30 minutes, filtering it, washing it with water to neutral, and drying it. Pickling can remove impurities such as iron, aluminum, calcium, and magnesium from the surface. The commonly used acids for pickling are hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, and hydrofluoric acid.

      It can be said that acid washed sand can fundamentally and absolutely eliminate harmful substances and potential radiation sources that may be generated on the human body. The use of acid washed sand can omit manual impurity removal before board production, but some brand enterprises still have impurity removal processes for greater safety. Acid washed sand is also known as A-grade sand in the industry, which is one of the reasons why the price of quartz stone is high.