Summarizes the classification of granite cleaning agent detection

Past two decades, granite has become the most fashionable one of building and furnishing materials, the appearance of its natural simplicity is difficult to compare with other decorative materials. However, the granite has not previously been expected "problems" are now more and more apparent. For example, often see granite rust, organic stains, water stains and water spots, salt and white spots of China, the surface loss of light and oil spots and so on. These problems undermine the original granite decorative effect, and clear marble with considerable difficulty, as they had penetrated the porous granite gap, not an ordinary scrubbing can remove the surface, while heavy equipment is destroyed considerable cost. Thus, the appropriate cleaning and control techniques have emerged. Special cleaning agents granite granite industry has become an indispensable branch of the field, revealing to the concept of economic prospects. At present, the development of granite cleaning agents, production and use still in its infancy, as soon as possible to regulate granite cleaning agent for the detection and evaluation methods of granite cleaning industry is of great significance. This is only an exploration, within and outside the industry for reference.

    1, the classification of granite cleaning Mosaic

    granite cleaning agents can be divided according to form: Liquid, aerosol type, powder type, etc.;

    Can be divided according to the nature of the solvent: water formulations, solvent type, emulsion, gel, etc.;

    According to the pH of cleaning agent can be divided into: acidic type of neutral, alkaline-type, etc.;

    Cleaning can also be subjects were divided into: Remove all dirt (inorganic impurities such as rust, ink, Chinese white, salt spots, water spots, etc.; organic dirt, such as oil spots, tea trace, biological pigments, etc.) of the special cleaning agent .

    Because the reasons for the formation of surface dirt granite vary, the appropriate role of the principle of cleaning agents and the use of methods must be different. Therefore, the granite must indicate type of cleaning agents, especially cleaning of the objects and conditions, and details are used.

    Clearly, unlike the granite cleaner protectant, it is difficult there is no need to harmonize all the technical requirements. Different cleaning agents according to their basic performance characteristics of the determination and decontamination capabilities. Determination is to ensure that the basic properties of the granite, the environment, humans, decontamination capability determination is to determine the cleaning effect of cleaning agent.

    2, the basic performance Slate

    The basic properties of granite cleaning agents, including physical and chemical traits. Mainly due:

    (1) Appearance: liquid detergent products (slurry products) should not be hierarchical, non-suspended solids or sediment; aerosol products should not be apparent separation; powdered product should not be agglomerated. This is to determine whether the product is the most basic method of deterioration.

    (2) Odor: cleaning agent should be no similar benzene, kerosene, fishy, ​​spicy or pungent odor, and should not be left to clean the granite was the smell. This is to determine whether the product has contaminated most basic ways.

    (3) to clear: when to use water when cleaning or other cleaning materials, cleaning agents and the role of the product should be completely removed. This is to determine whether the product will be left of the most basic ways.

    (4) Flash point: The flash point of solvent-based products must be determined, according to ASTM-D39 specific determination. This product is flammable and explosive is to determine the most basic ways.

    (5) pH value is measured: at room temperature, measured with a pH value of the stock solution and the use of the cleaning agent concentration, pH value (accurate to 0.1pH), marked.

    (6) Stability: Stability of the lotion is to see the stability of high or low temperature: the liquid cleaning agent into a clean 60ml glass reagent bottle, placed in 40 ± 1 ℃ oven or a 3 ~ a 10 ~ (2 refrigerator, 24h, remove, place the indoor return to room temperature, check its appearance and smell, and determination than before to be basically unchanged.

    (7) toxicity: the safety. Cleaning agent raw materials should not contain highly toxic materials, such as hydrofluoric acid. Cleaning agents for the human body and the environment is a very important issue, recently took place on the external walls of a city in Zhejiang cleaning agent pour in the human body and poisoning deaths. granite cleaning agent toxicity may arise on the skin, mucous membranes and respiratory system and other parts of the stimulation, damage, and can cause harm to the environment with reference to the Ministry of Health determined the detection of environmental disinfectant (or reference to the recent publication of the American Medical Association Determination of Environmental Health files). At present, China-related toxicity testing cleaning agent is still the weak link in the light of the detection method can be very small. As for the human, biological and environmental risks and negative effects will be increasingly attracted attention, forward-looking granite cleaning agent in the specification included in the cleaning agent toxicity testing and evaluation methods is necessary.

    3, the cleaning agent decontamination ability of the detection method

    3.1 Preparation of samples of granite

    Vary the actual stain, in order to facilitate the cleaning agent in the laboratory assessment of the decontamination effect, the first granite should be uniform smear specimen preparation laboratory. granite common stains are: rust, Bai Hua (alkaline spots). Water spots. Organic stains (tea, coffee, straw yellow, excretion or decay of biological material, etc.). Oil spots (including lipids and waxes. Into mineral, plant, animal). Cement spots, glue or bonding agent. Aged dust, dirt. Ink and other chemical impurities, such as microbial scar. Artificial parts of the actual preparation of the stains and dirt will have a certain gap, in order to ensure the consistency of the standard laboratory method of preparation of smear samples should be representative, and the more realistic the better. We already have a method of production of such stains, due to space relations, and is not described.

    3.2 sample cleaning steps

    As the dirt and granite variety of cleaning agents, the use of different methods, it is difficult to unity cleaning steps, generally used only in accordance with the manufacturer's instructions described methods. In order to effect a more scientific assessment of decontamination is required to set;

    (1) blank sample: that is, without stains do not wash the same kind of granite-like, as a cleaning, washing and residual factors comparable reference material;

    (2) blank cleaning sample: that is, without stains, but cleaning the same kind of the same granite, to compare the cleaning of the granite appearance and surface morphology;

    (3) Reference sample: that is stain and only kind of cleaning agent like granite cleaning solvent to ensure the credibility of artificial stains. In addition, the cleaning of granite stain test sample requires at least three parallel samples in order to reduce random error.
 
    3.3 The inspection and evaluation of cleaning effect

    granite cleaning effect of the test and evaluation includes two aspects to improve the appearance, the second is to improve the surface characteristics (especially the cleaning of granite artifacts to be inspected and assessment). It should be noted that, as far as possible to determine numerical order to reduce the influence of human factors.