1.
Latex paint, wallpaper, diatom mud big PK
Who is better?
Latex paint, wallpaper and diatom mud have been controversial since they appeared in home improvement wall decoration materials. Fans regard them as standards, while those who hate them scoff. Businessmen also take the mentality of attacking and slandering each other for their own interests: all kinds of PK, people who look at experiments and data are dazzled ... here, don't pretend to say, have you considered the feeling of wallcovering?
The result of PK: which is better, latex paint, wallpaper and diatom mud, the scientific community has not yet reached a conclusion.
In fact, using the increasing attention of ordinary consumers to environmental protection as a gimmick and comparing three completely different materials, such an experiment itself is of little significance. Objectively speaking, latex paint, wallpaper and diatom mud belong to three different industries. When a product can develop into a mature industry, its existence is reasonable.
As for the environmental protection issues that people are most concerned about, every industry has relevant standards formulated by the state, and every industry also has unscrupulous merchants who ignore the national standards. No matter latex paint, wallpaper and diatom mud, products ranging from tens of yuan to thousands of yuan can be found in the market. Consumers need to be rational when choosing, keep their eyes open and try to choose big brands.
2.
Don't listen to the nonsense of the merchants.
What suits you is the best.
"Our diatom mud can adsorb formaldehyde, and our latex paint can purify the air ..." When we hear the shopping guide talk about various additional functions of their products and hesitate, don't forget our original intention of choosing wall decoration materials-decoration. Take wallpaper for example, it is also an interpretation of European pastoral style, and some people will match it with the same effect as the disaster studio.
3.
Suggestions on selection of wall materials
Start with the construction slowly.
For the wall, what color or pattern to choose depends on the overall indoor color scheme (in soft decoration design), and what wall material to choose is the problem to be solved in this paper. Latex paint/wallpaper (including wall covering)/diatom mud?
1. First, briefly introduce the construction methods of the next three wall materials.
The process of wall foundation treatment is: repair (gypsum, cement mortar, etc. )-sealing (interface agent)-leveling (rough leveling first, then fine leveling, fine leveling will use putty).
Roller brush latex paint
Then brush latex paint: polish it with gauze, clean up the floating dust on the surface, brush the primer once, and then brush the topcoat twice (almost all latex paints in China need color mixing paste, and the adjusted color may be different from the target color);
Paving wallpaper
The pasting of wallpaper is: after the wall surface is treated at the basic level, a layer of basement membrane is brushed on the wall surface, and then the environment-friendly glue is paved according to the design method.
diatom ooze
The construction method of diatom mud is that the basic level is treated, and the diatom mud is adjusted in color before going to the wall. There are many S construction methods for the upper wall, depending on the effect.
You find that diatom mud and latex paint need to be colored, but wallpaper doesn't need to be colored.
4.
Can diatom mud really be purified?
Re-understanding of Diatom Mud Wall
When it comes to diatom mud, do you immediately see pictures of absorbing/purifying formaldehyde, adjusting humidity and releasing negative ions? . . Various sellers boast about the benefits of heaven. What is the truth? Let's talk about two misunderstandings about diatom mud:
Image source: Zhihu Dad detection
Diatom mud is not equal to 100% diatomite.
Diatom mud is the residue after the death of diatom (diatom earth), which is mixed with gypsum, lime and other substances (to increase viscosity). Diatomite is the main raw material of diatom mud, and its porous structure makes its adsorption capacity higher than that of activated carbon, but it only adsorbs.
Microstructure diagram, diatomite on the left and activated carbon on the right.
Image source: Zhihu Dad detection
According to the regulations of diatom mud self-discipline convention, the best range of diatom mud content is 15%-35% (not as high as possible, because too high content requires organic gel to meet the viscosity requirements of the wall, which will increase the indoor pollution risk), and it will reach saturation regardless of the adsorption force. Moreover, the diatomite content is so low that the amount of formaldehyde adsorbed is really limited.
Diatom mud product page
The ability of diatom mud to decompose formaldehyde is very limited
The above-mentioned merchants also said that if it is only adsorbed without decomposition, the adsorbed formaldehyde will be saturated and released, and the most important thing is that it can be decomposed. He himself said that it can be decomposed, but there are different opinions from all walks of life about whether it can be decomposed. I understand that photolysis of formaldehyde by titanium dioxide can take place in the laboratory, but it takes place under various suitable experimental conditions. Under normal indoor conditions, this reaction (if any) is weak.
In short, it is very unnecessary to buy diatom mud on the grounds that diatom mud can decompose formaldehyde, and it is also possible to use its face value.
In addition to the above two points, we can regard diatom mud as an ordinary wall decoration material. Its biggest feature is that it can really adjust the indoor humidity. In Japan, diatom mud is often made into bath mats and umbrella stands. Because it can absorb water. At the same time, if the room is dry, it can release the water it absorbs to adjust the indoor humidity.
Like latex paint and wallpaper, let's take a look at the following properties of diatom mud:
Environmental protection: Well, good diatom mud itself will not release formaldehyde, and it is still environmentally friendly, but pay attention to the fact that formaldehyde absorption capacity is easily saturated, and formaldehyde adsorbed on the wall will be released when air conditioning or floor heating is turned on, so it is necessary to open more windows for ventilation.
Decorative: diatom mud is more decorative than latex paint. Diatom mud can be in various colors and patterns, just like painting on the wall, and it can also have three-dimensional effects such as protrusions and depressions, and then it is not as good as wallpaper. A few days ago, I visited some building materials markets and saw that the color, texture and feel of diatom mud were obviously much more sculptured ~ the decoration was not inferior to latex paint at all.
To the following renderings, it really doesn't matter ~ ↓↓
Price: diatom mud, the "interior wall environmental protection paint" with a high sales volume on a website (used and constructed by company personnel, with a free warranty of 2 years). Suppose a 70-square-meter house with 60-square-meter painting area needs about 3 barrels, that is,1139 * 3 = 3417. In addition, the brand said that it would be used. Generally speaking, the price of diatom mud is about 70%- 140% higher than that of latex paint.
Service life:? 15-30 years.
It is difficult to repair and renovate: because diatom mud construction is relatively simple, it is good to apply it directly when it needs to be repaired. Diatom mud renovation also needs to eradicate the wall, redo the foundation treatment and re-construct.
5.
Environmental protection contrast
Comparison of various properties between latex paint and wallpaper
Latex paint: the domestic production and construction technology is relatively mature, and the state has strict quality monitoring standards for interior wall latex paint. So regular brand latex paint products are relatively safe. Moreover, after years of improvement, many products with low voc (volatile organic compounds that can cause harm) and almost zero formaldehyde are increasing, and some new functional products that can purify odor and improve air quality have emerged.
Wallpaper: Compared with latex paint, the domestic wallpaper industry is chaotic and the national standards are not uniform. There are many imported brands in the market, but the quality of domestic wallpaper is mixed. At present, the main cheap material in the domestic market is pvc, and pvc wallpaper is likely to contain plasticizers and volatile organic compounds.
In addition, the choice of base film and glue used in wallpaper is more important. No matter how environmentally friendly the wallpaper is, it's no use if you don't choose accessories, and the amount of formaldehyde is increasing. The basement membrane is the protective film between the wallpaper and the wall, which protects the surface of putty by curing and facilitates the pasting of wallpaper. Wallpaper glue is the biggest problem that affects the degree of environmental protection. At present, there are four kinds of wallpaper adhesives on the market:
A. Rubber powder+mucilage: Rubber powder is mainly potato starch, and mucilage is mainly white glue (polyvinyl acetate) or a transparent glue (one of the raw materials of transparent glue is formaldehyde). When in use, the rubber powder is first poured into water for adjustment, and then mucilage is added to enhance the viscosity. In order to save costs, some businesses will use transparent glue instead of white glue, so it is best to smell it when buying and ask for the test report.
B. Wet glue: raw materials are glutinous rice starch, corn starch or wheat starch. When in use, it can be diluted with water. It is the most commonly used wallpaper glue at present. However, unscrupulous merchants will also add unqualified chemical synthetic glue to increase adhesion.
C rabbit glue powder: The raw material is modified potato starch or plant fiber, and its environmental protection performance is not as good as sticky rice wet glue.
D. Barreled finished rubber: for direct use, its main component is white rubber-starch, but most of it is imported rubber, which is very expensive and has good environmental protection performance.
-Four wallpaper adhesives, referring to Zhihu Chen Jun..
(2) Decoration contrast
Latex paint: Latex paint has many colors, and almost any color can be adjusted. In recent years, there have also been many texture paints with composite colors and three-dimensional effects. However, there may be color difference in domestic paint mixing, and there will be slight color difference between the color mixed and the color on the wall, and the pattern is still not as rich as wallpaper.
Wallpaper: Rich patterns are the biggest feature of wallpaper. No matter what patterns can be achieved through wallpaper, there are also techniques and materials such as convex surface, velvet and plants, which can create almost any atmosphere you want.
(3) Price comparison
Latex paint: There are many varieties of latex paint, many functional coatings and a large price range. Take a set of "second generation five-in-one clean taste" topcoat 18L*2+ primer 18L* 1 as an example. A 70-square-meter house is about 2029 yuan (excluding labor costs). (These two brands are well-known brands in domestic latex paints, and the theoretical paint consumption is about 12- 14m 2/L/ one way).
Wallpaper: Speaking of latex paint, you may know many brands. Speaking of wallpaper, which brands can you think of? There seems to be no well-known domestic wallpaper brand. . . It seems that all the better wallpapers on the market are imported. . . So its price is relatively high. On a website, "Simple modern living room bedroom background wall linen wallpaper" sells well. 59 yuan /m2, with an area of more than 30 square meters, will be packed with auxiliary materials (I don't know what glue to mix). Suppose that the wallpaper area of a 70-square-meter house is consistent with the wall paint, and the paving area =(70- kitchen and bathroom area is set to 10)*3= 180 square meters, that is, the cost is 6580 square meters.
Note: The calculation method of the wall area painted with latex paint or wallpaper is: the usable area (total area minus kitchen and bathroom area) multiplied by 2.7-3.5.
(4) service life
Latex paint: The main factor that determines the life of latex paint is the adhesion duration of its base material, that is, the emulsion film, which is reflected in its scrub resistance and alkali resistance. Scrubbing resistance reflects its adhesion to paint, while alkali resistance reflects its function of resisting environmental erosion to a certain extent. The life of latex paint will also be affected by wall conditions, space humidity and human factors. Usually, the life of latex paint is about 5-7 years. After that, latex paint will have different degrees of powder shedding and peeling.
Wallpaper: The material strength and performance of wallpaper itself and the service life of wallpaper binder determine the service life of wallpaper, and the latter is the most important. Many wallpapers are warped, leaked, yellow, etc. All because of the poor quality of the glue. Usually, the service life of paper wallpaper is about 5 years, that of pvc wallpaper can reach 8- 10 years, and that of cloth wallpaper is longer.
(5) the difficulty of repair and renovation
Latex paint: it can be directly brushed and repaired, but it is easy to have color difference. If it is decoration, the best way is to shovel the wall and redo the basic treatment-polishing-one bottom and two sides. The color directly refreshed on the surface of latex paint will affect the decorative effect and service life.
Wallpapers: Wallpapers are repaired by patterns, but most of them are torn off and replaced. Wallpaper renovation is more convenient. For wallpaper with different materials, tear it off in a slightly different way and check whether the wall is damaged. If not, just paste a new wallpaper.
To sum up, it is the content of the table below.
The form I made myself can make do with it!
To sum up, I choose the corresponding products according to my own needs, and I like to remember to like them ~