300+samples submitted for inspection revealed: Quartz stone countertop leaked color within 30 minutes, artificial stone coating failed! Quality inspection experts release guidelines for avoiding pitfalls.
The building materials industry has analyzed over 300 stone samples for many years. The quality of quartz/artificial stone in the market varies greatly, and consumers can quickly distinguish between good and bad through the three core indicators of impermeability, wear resistance, and environmental friendliness. Experimental data shows that low-quality stone has hidden dangers such as color bleeding and dyeing, cracking risks, and excessive formaldehyde.
1、 Anti leakage color test: Time and density determine quality
·High quality quartz stone: density>2.4g/cm ³, no residual traces after soaking in soy sauce for 24 hours;
·High quality artificial stone: treated with a special coating (certified by SGS), with zero coffee stain penetration rate;
·Poor quality product: containing a large amount of recycled materials and excessive resin, it can be penetrated and dyed by soy sauce in 30 minutes.
·High quality quartz stone: density>2.4g/cm ³, no residual traces after soaking in soy sauce for 24 hours;
·High quality artificial stone: treated with a special coating (certified by SGS), with zero coffee stain penetration rate;
·Poor quality product: containing a large amount of recycled materials and excessive resin, it can be penetrated and dyed by soy sauce in 30 minutes.
2、 Wear resistance comparison: Hardness grade is the watershed
·Quartz stone: with a Mohs hardness of 7 (equivalent to natural quartz), it is scratch free from wire brushes and keys;
·Artificial stone: Mohs hardness level 5-6, daily use should avoid sharp object impact;
·Poor quality products: The surface coating is prone to peeling off, and obvious abrasion marks appear within one year of use. The substrate is brittle and prone to cracking.
·Quartz stone: with a Mohs hardness of 7 (equivalent to natural quartz), it is scratch free from wire brushes and keys;
·Artificial stone: Mohs hardness level 5-6, daily use should avoid sharp object impact;
·Poor quality products: The surface coating is prone to peeling off, and obvious abrasion marks appear within one year of use. The substrate is brittle and prone to cracking.
3、 Environmental safety red line: formaldehyde emission is a hard indicator
·Standard stone: formaldehyde emission<0.1mg/m ³ (with national testing institution number for traceability verification);
·Poor quality products: Using cheap adhesives, there is an irritating odor upon opening the box, and harmful substances are released for a long time.
·Artificial stones/quartz stones with low prices often contain calcium carbonate and recycled materials, which cannot guarantee their performance and environmental friendliness.
The experimental conclusion of this article is based on comparative testing of 300+samples of artificial stone/quartz stone submitted for inspection (2019-2025)
·Standard stone: formaldehyde emission<0.1mg/m ³ (with national testing institution number for traceability verification);
·Poor quality products: Using cheap adhesives, there is an irritating odor upon opening the box, and harmful substances are released for a long time.
·Artificial stones/quartz stones with low prices often contain calcium carbonate and recycled materials, which cannot guarantee their performance and environmental friendliness.
The experimental conclusion of this article is based on comparative testing of 300+samples of artificial stone/quartz stone submitted for inspection (2019-2025)
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