Black Limestone Wall Cladding

Upgrade your space with our Black Limestone Wall Cladding. Experience the durability and elegance of these limestone panels that will elevate any interior or exterior design. With their sleek black color and sturdy material, they are perfect for adding a touch of sophistication to your home or business.

The reporter learned that many stone dealers often describe artificial marble as natural marble or even confuse it in the sales process. Professor Gu said that distinguishing between artificial and natural black limestone wall cladding is very simple: a few drops of dilute hydrochloric acid will cause natural marble to foam very violently, while artificial black limestone wall cladding will foam weakly or even not.

Professor Gu suggested that whether to purchase natural or artificial stone, you must obtain a certificate of radioactivity and harmful gas indicators from the merchant, or ask a professional inspection agency to conduct an inspection.

However, the radioactive problem of various decoration materials also affects natural black limestone wall cladding, which has caused widespread concern in the society. my country’s current "Building Material Radionuclide Limits" (GB6566-2001) standard is a national mandatory standard revised and issued by the General Administration of Quality Supervision, Inspection and Quarantine in 2001. The decoration materials in this standard contain only granite but not marble. , And stipulate that the limits of radionuclides in decoration materials shall be classified and controlled, and there must be clear signs and identifications, that is, according to the specific activity value of radionuclides contained in the decoration materials, the radioactive levels of decoration materials are divided into three categories: A, B, and C according to the size , Different categories are applicable to different building parts. The scope of production, marketing and use of Class A decoration materials is not restricted; Class B decoration materials cannot be used for the interior surfaces of Class I civil buildings, but can be used for the exterior surfaces of Class I civil buildings and the interior and exterior surfaces of all other buildings. ; Class C decoration materials can only be used for the exterior of buildings and other outdoor uses; materials larger than Class C can only be used for monuments, seawalls, bridge piers and other places where humans are less involved. The promulgation of this standard has played a positive role in understanding and distinguishing the radioactivity of various decoration materials.

However, in 2001, the State Administration of Quality Supervision, Inspection and Quarantine, the former Ministry of Foreign Trade and Economic Cooperation, and the State General Administration of Customs jointly issued Announcement No. 14

(1) Since January 1, 2002, statutory inspections will be implemented on imported stone and paint products;

(2) Since January 1, 2002, for imported black limestone wall cladding and paint products, the customs shall check and accept the "Entry Goods Clearance Form" issued by the entry-exit inspection and quarantine agency;

(3) The environmental control requirements of this category of commodities must comply with the national standard "Indoor Pollution Control Regulations for Civil Construction Engineering" and the national standard "Indoor Building Decoration Materials Hazardous Substance Limits". No sales or use shall be allowed under the relevant state regulations on customs limits;

(4) The inspection and issuance of certificates for imported stone and paint products shall be implemented in accordance with the relevant regulations of the original State Entry-Exit Inspection and Quarantine Bureau.