Hardness: the surface Mohr hardness is 7. A simple detection method is to use iron sharp objects to observe the condition of damage points, and it is qualified if there is no scratch.

Qualification indexes and testing methods of quartz插图

Density: 2.37-2.5

High-temperature resistance: it can withstand a high temperature of 300 degrees Celsius. It can be placed on the table with a stainless-steel container filled with boiling water, and it will not change color for 30 minutes. Or put a burning cigarette end on the quartz stone, and it will not change color.

Qualification indexes and testing methods of quartz插图1

Eco-friendly: provide green environmental protection certification detected by authoritative departments.

Flame retardant: 10mmx30mm quartz strip can’t burn on an open fire.

Acid and alkali resistance: etch the surface with 3% hydrochloric acid solution or 100g / L lemon solution, 30g / L sodium hydroxide, or strong potassium oxide solution, and there is no obvious visible change on the surface.

Water absorption: less than 0.02%. Sprinkle a little water on the quartz stone surface and observe whether the color is white after 24 hours.

Qualification indexes and testing methods of quartz插图2

Flexural strength: Standard Sn / t0308-1993

Compressive strength: Standard Sn / t0308-1993

Thermal expansion: Standard Sn / T17748-1999

Radioactive limit index (no radiation): the internal and external exposure index conform to bg6566-2001, and the detection result of king quartz is that the internal exposure index is 0.02 and the external exposure index is 0.03

Brightness: use a light meter to detect more than 60 degrees.

Appearance sense: clear without mixing, uniform color.