The collection of classic furniture has always been the love of investors, but the collection of classic furniture cannot only focus on whether the material of the furniture is expensive and whether it is long-term, and there is a big misunderstanding in the collection of furniture by current investment businesses. Furniture made of wood such as Huanghuali and red sandalwood must have a lot of room for appreciation, but people in the industry have reservations about this. At the same time, they point out that some furniture with very good workmanship and high artwork is also worth collecting. Â Â In the purchase of furniture as collectibles, the most should pay attention to the furniture tasting, like many collectors fly blindly follow the trend of mind is most easily strayed into the minefield, plus most of the furniture on the market today It is an antique product. Although it also has a certain collection and appreciation value, the product quality is uneven. Therefore, if conditions are available, when selecting, you can buy classic furniture accompanied by people in the industry. Â Of course, in daily life, collection experts can also charge themselves more, use the knowledge and theory in the book to study the collection of classical furniture, and also remember to put the theory into action, more to the market for screening and comparison, Only in this way can we get more benefits. When purchasing classic furniture, collection experts, in addition to comparing the shape, color, and production of classic furniture, they must also carefully observe the wood grain of the furniture material and whether it is polished with wax. Some merchants are particularly attractive to the home. Attention, the color of the paint cover is made bright and bright, this is obviously made by people, and it is not worth buying. Â Finally, remind the majority of furniture collection enthusiasts that it is important to understand the basic knowledge when they first come into contact with this industry. At the same time, they must purchase according to their financial resources and strength, and consider the art and appreciation value of the collection. Do not blindly follow the collection. . (Editor: Peter) Â
Polyacrylamide (PAM) is a water-soluble polymer, which is insoluble in most organic solvents, has good flocculating properties, can reduce frictional resistance between liquids, Can be divided into non-ionic, anionic, cationic and amphoteric four types.
When PAM is used for flocculation, it is related to the surface properties of the species being flocculated, especially the potential, viscosity, turbidity, and pH of the suspension. The kinetic potential of the particle surface is the reason for particle inhibition. Can reduce the potential and condense.
Granular polyacrylamide flocculant cannot be directly added to sewage. It must be dissolved in water before use, and its aqueous solution are used to treat sewage.The water in which the particulate polymer is dissolved should be clean. Generally tap water is suitable for formulating polymer solutions. Strong ACID, strong alkali, high salt water is not suitable for preparation. Water at room temperature is ok, no necessary to heat. Dissolution is slow when the water temperature is below 5 ° C. Increasing the water temperature will accelerate the dissolution rate, but above 40 ° C will accelerate the degradation of the polymer and affect the use effect. The solution concentration is recommended to be 0.1% -0.3%.
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Precautions for investment and collection of classical furniture
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