Wallpaper is now a wall decoration that many people will choose, and more are used in offices and homes, but does the wallpaper contain formaldehyde? Many wallpaper ads are green without formaldehyde, but are there really no formaldehyde? Do you need to pay attention to the wallpapers containing formaldehyde? There are two main reasons for the presence of formaldehyde. The first is when pulp is made, in this process there is a method of aldehydes and aldehydes to reduce the residual free formaldehyde in the pulp; and secondly, since the wallpaper glue is used adhesive. The adhesive contains free formaldehyde. The harm of formaldehyde The important hazards of excessive formaldehyde are manifested as irritative effects on the skin and mucous membranes. When formaldehyde exceeds the normal standard concentration in the room, people feel uncomfortable and can cause redness, itchy eyes, throat discomfort or hoarseness, sneezing, chest tightness, wheezing, and dermatitis. Such phenomena. Buy wallpaper notes 1. It is best to buy in large supermarkets or specialty stores. It is best to buy big brands if the conditions permit. Relatively speaking, the large-scale supermarkets and specialty stores have strict implementation and supervision systems, and their operations are more standardized, and the prevalence of selling counterfeit goods is relatively small. 2. When choosing wallpapers, it is necessary to master the four principles of “seeing, touching, smelling, and rubbing.†That is to say, if there are color differences, wrinkles, and air bubbles on the surface of the wallpaper, if the flower case is clear and the color is well-proportioned; touch the wallpaper and feel texture. Whether it is good or not, whether the thickness of the paper is the same or not; smelling wallpaper, if there is a pungent smell, it is likely that the content of volatile substances such as formaldehyde and vinyl chloride is higher; if the paper surface is wiped with a damp cloth, is there any signs of decoloration? 3. The room should pay attention to ventilation after completion of the renovation, you can buy some plants such as spider plants, aloe vera, and tiger's-tail. Necessary to think that "choice of environmentally friendly materials can be assured to stay", "decoration of the room smell is not safe," and other errors, it is best to ask a professional testing agency or in addition to formaldehyde in the room before the arrival of indoor air pollution testing Check in again! The above is to bring you wallpaper with formaldehyde and buy skills, wallpaper is still more environmentally friendly than the paint, but there are still some inferior wallpaper contains formaldehyde, so we need to pay attention to this when choosing the wallpaper One point, the purchasing techniques described above, I believe can bring you some help, if you want to know other relevant information, please continue to pay attention to this site, more exciting so stay tuned! Wallpaper living room wallpaper wallpaper selection Mild steel, sometimes referred to as carbon steel or ordinary carbon steel, is defined as having a carbon content of no more than 2% and no other perceptible alloy elements. Carbon Steel Bolts,High Carbon Steel Bolts,Bolt Carbon Steel,Carbon Steel Fasteners Taizhou Hongchuang Hardware Co., Ltd. , https://www.jstaizhouhongchuang.com
This steel is produced on a large scale and is the largest part of the steel production industry. You will be able to find it in various applications, fasteners and fasteners.
Generally, this kind of steel has high strength, high hardness and magnetism, and is usually used in motors and electrical appliances - however, their corrosion resistance is poor, and should not be used in corrosive environment without protective coating or coating.
There are some differences between low-carbon steel and steel, because steel has lower toughness and greater brittleness, and low-carbon steel can be further strengthened by adding carbon.
If you need more information or want to order carbon steel products, such as hexagon Bolts, carriage bolts, flange bolts, U-bolts, union bolts, expansion bolts, threaded rods, please contact us.