There are now many brands of marble on the market, which generally consist of two types: natural marble and artificial marble。
Natural marble, which is named after the greatness city of dalley county, yunnan province. It is re-crystalized with minerals from limestone and white clouds at high temperatures and pressure, and it changes in quality, and it has hidden crystal structures. Marbles without impurities are white and also known as han baiyu. Natural marbles are finely organized, solid, polished as mirrors, textures that are much better than granite stretches, beauty. High resistance (after granite) and can be as high as 300 mpa depending on the rock formation, with low water intakes and abrasives。
Marbles sold on the market are divided between natural marbles and artificial marbles, while natural marbles are divided between high-quality marbles and poor-quality marbles, and the choice of marble furniture begins with understanding the differences. Each of the natural marbles has a unique natural pattern and colour, and high-quality marble furniture selects a whole block of raw materials for different parts of the material. The main area will have a large area of natural texture, while the edges will be a bit suffocated on the back of the chair and the head of the pole. Poor-quality furniture, on the other hand, selects the edges when the material is prepared, with no changes in the surface。
Natural marble natural stones can be classified into three categories according to the concentration of radon equivalents, of which category a products are not restricted in use, category b products cannot be used for indoor cover and category c products can only be used for facades of buildings. In the case of home decorations, category a products should be selected, bearing in mind the requirement for a radioactive inspection certificate。
Natural marble
Natural marbles are the original rock in the crust, which gradually evolves through the high temperature and pressure of the crust, eventually forming marble, a natural product. Most of the natural marble components are metallite, limestone, white clouds or snake grafts; a few are han baiyu and aiqing。
The advantage of natural marble
The hard stone in the natural marbles is well grounded, it has a natural appearance, and the hand is better when polished, it is not colour-free, it has natural fur holes, and it penetrates。
The shortcomings of natural marble
Natural marbles are more fragile, unsophisticated when decorated, and the connection between each marble is obvious, they are susceptible to residual bacteria, and they are insufficiently resilient to repair and repair, and some of them are radioactive and harmful to the human body。
Scope of application of natural marble:
Natural marbles are more pure and less impurity can be used outdoors, such as han baiyu and aiqing, while other varieties can only be used as interior decoration material。
Artificial marble
Man-made marbles are divided into concrete-type man-made marbles, resin-type man-made marbles, the burning of man-made marbles, stickers and stone-based marbles. The first three are coated with natural marble or granite, and made with cement, plaster and unsaturated polyester resin as a visceral formulation, grinding and polishing. All stickers and marbles are used to base themselves with poor marbles, either on the surface or on the stone. Artificial marbles are made of unsaturated polyester resins as a visceral agent, added to inorganic powders such as natural marble, square quartz, platinolite, glass powder or silicate, fitted with appropriate flame retardants, dyes, etc., which are then solidified through a series of mixing, ceramic casting, vibration, compression and squeeze processes, which eventually form artificial marble。
The power of artificial marble
The colored style is rich, non-irradiated, more resilient than natural marble, and the links between each marble are not visible and the overall appearance is strong。
The flaws of artificial marble
Small hardness, injury-prone, intolerant, afraid of colour, and some chemical synthetic substances are added to the production process, which in part is harmful to the human body。
Scope of application of artificial marble
They are often used in kitchens, toilets and, more often, cabinets or decorations on windows, floors, etc。
How to identify marble and natural marble
Natural marble identification:
1. Texture: each natural marble has a unique natural pattern and colour。
2. Hearings: in general, the stone of good quality is the sound of a knock。
3. Perceiving light: high perforation of natural marbles, exposure to the back of marbles with a lighter or hand power, and high perforation。
4. There is a simpler approach to identifying man-made and natural marbles: drop a few drops of rare hydrochloric acid, a sharp rise in natural marbles, and a weakness or even failure to reach them。
The simplest method of identifying the products is to check for iso quality system certification, quality reports, production quality cards and associated anti-false markings。
Is marble radioactive
Marbles are radioactive, radioactive radon, harmful to humans ... Radon, an inert gas that is colourless and undetectable ... Cement, brick brakes, marbles, and building materials such as tiles are the main source of radon, and there will also be a large amount of radon in the geological fracture zone ... Radon and its radon will enter the human body with air, or will be attached to the caustic mucus and pulmonary surface, or dissolved into the cell tissue, creating internal radiation, causing lung cancer, leukemia and respiratory pathologies ... Research by who has shown that radon also has a high degree of prognosis and strength in human fat, thus affecting the human nervous system, causing mental discomfort and unconsciousness. Radon is the second largest cancer after lung cancer caused by smoking。
The deeper the color, the larger the radiation, the smaller the light-colour radiation, the more brilliant the family uses, and then the bigger the flowers and the light color。
Both natural and man-made marbles contain trace radiation. Experiments have shown that natural marble radiation is higher than synthetic. The dose rate for marble is in the range of 0. 23 μsv/h, greater than this value is a high level of radiation, below which it is negligible. However, as long as exposure takes place, it does not affect human health. What really determines its radioactivity is the “place of birth” of stone, the geological conditions of its origin, which determine its radioactivity。
Natural marbles are a little less harmful, and artificial marbles add some other harmful substances because of their commercial greed, so we have to be prepared to work when buying them, avoiding the purchase of highly radioactive marbles。
Of course natural marble is radioactive. The vast majority of radioactive materials contained in natural stone are at very low doses and generally do not pose a risk to human health。
Natural stones can be classified into categories a, b and c according to their radon equivalent concentrations, of which category a product is not restricted in use, category b product cannot be used for interior cover, but can be used for internal and external cover of all other buildings, and category c product can only be used for exterior surfaces of buildings. Thus, household decorations should be based on category a products and, in the purchase of stone products, should not forget the requirement of a radioactive inspection certificate。
It is now popular, where man-made stone is made of natural stone for raw material, and thus inherits some of the advantages of natural stone, while discarding some of its shortcomings and making it cheaper than natural。
Natural marbles and artificial marbles are dangerous
Artificial marble:
Artificial marble has a certain amount of radiation, which is largely negligible to the human body. Natural marbles are significantly more radioactive than artificial marbles, which, in addition to being radioactive, use adhesives and materials such as yakli, aluminium powder, etc., also produce harmful gases of formaldehyde, benzene, etc. Therefore, the following should be noted when purchasing marble:
The first is to go to a regular business to buy, in particular, man-made marbles, for which the manufacturer must produce a relevant test report
The second is to identify marbles as good and bad, with hand-pumps, with loosely structured marbles with low-sounding voices, and with fine-quality marbles。
Natural marble:
There is some radiation in the natural marble, but let's not be too concerned, because the radiation in this marble is not so large as to cause too much damage to us, because marble extraction is made of the deterioration of some of the limestone in nature, so there are radioactive substances in the composition process, which is, of course, very low. Natural stones, which vary according to the type of stone and the degree of radiation, can be used in domestic clothing as long as they meet national level a standards and do not cause harm. Indoor decorations should therefore minimize the use of natural stones such as marble and granite and, if they are to be used, must be tested to prevent radon radiation. With regard to the hazards of radon, the following are briefly described:
Radon is a colourless, odourless, invisible inert inert gas. The radon and its subbody enter the human body with air, or are attached to the pneumatic mucous membrane and lung surfaces, or the dissolved body fluid enters the cell tissue to form internal radiation and induce lung cancer, leukaemia and respiratory pathologies. Who studies show that radon is the second largest cancer of lung cancer after smoking。
It is therefore particularly important to choose man-made stones of guaranteed quality. In the winter, especially in the north, air is not fluent when homes are shut down and indoor temperatures are high, which accelerate the volatilization of such solvents as "toxboard" benzene and formaldehyde, with even greater damage to human well-being!
