Interior wall paint is very important to people's life and health, but many times there will be some common problems such as cracking, falling off, blooming, etc. after a period of decoration, so what is the main reason? Found it Causes can be found and measures can be taken to solve them.

 

Main reason 1: The finish is blooming and the color is uneven.

 

1. The quality of the coating itself. Such as paint itself has floating color. This is due to the fact that the density difference of the pigments used in the paint is too large, causing the pigment particles with low density to float on the top, and the particles with high density to gather at the bottom, resulting in color separation. Although it is fully stirred during construction, the coating is still prone to color differences during the brushing and drying process, and poor or uneven dispersion of pigments in the coating may also cause color fading. The pigment dispersion is not good or the dispersion of several pigments is uneven. During the brushing or roller floating construction, it is easy to produce stripes and color differences in the direction of the brush and roller.

 

2. Improper construction will cause uneven painting, and unskilled construction technology will also cause different shades of color. The ratio of pigment to base material is inappropriate, too much pigment and filler, too little resin component, and uneven color development. If the basic base is too alkaline, the use of non-alkali-resistant pigments in the filler will easily cause uneven color.

 

The second main reason is that the paint surface is peeled, cracked and peeled off.

 

1. The shedding itself is not good in film formation. For example, when the temperature of latex paint is too low during construction, the emulsion itself cannot form a continuous film and cause cracks, and it will fall off when it meets water and moisture.

 

2. In the paint components, the content of pigment and filler is too high, and the content of resin is too low, resulting in poor adhesion of the coating film.

 

3. The base layer is loose and has floating dust, oil stains and other unclean substances, and the adhesion between the coating film and the base layer is not good.

 

4. When leveling the base, the putty used is low in strength and easy to pulverize, especially in places with high humidity such as kitchens and bathrooms. The putty has low strength and poor water resistance. fall off.

 

5. If the base layer is too smooth, it is easy to cause poor adhesion of the coating film.

 

6. Improper construction causes cracking of the coating film due to different drying speeds inside and outside.

 

In addition, the interior wall paint needs to be environmentally friendly and healthy. In modern life, many people suffer from sub-health problems, dizziness, fatigue, and lack of energy. If the brand of interior wall paint is not selected properly, it may cause harmful effects such as formaldehyde. Gas pollution seriously endangers the health of family members and themselves.

In the paint industry, thick build water-based paints will encounter foam problems during the production process, and the foam of thick build water-based paints is more difficult to solve. At this time, manufacturers will use thick build water-based paint defoamers to solve this problem. So what should you pay attention to when choosing a thick build water-based paint defoamer?

 

1. The focus of high-build water-based coatings is not the defoamer, but the defoaming

 

Since the viscosity of the high-build water-based paint itself is very high, the air bubbles in the high-build water-based paint system cannot appear on the surface, so when choosing a defoamer, the air bubbles in the system must be released, so that The defoaming effect can be achieved without affecting the coating.

Paint is a commonly used building material for home decoration. I believe that many people have some understanding of how to choose paint, but some consumers still fall into misunderstandings during the selection process. Most of these misunderstandings are caused by some equivalent concepts. Let's take a look at which equivalent concepts have influenced your paint selection.

 

Myth 1: Odorless = Eco-Friendly

 

When choosing a paint, many people judge the safety of the paint by "smelling". Some consumers have the misunderstanding that if it smells good or smells good, it is environmentally friendly. In fact, the paint can be made odorless by adding flavors or low-odor materials, so odorless paint is not environmentally friendly.

 

Selection method: There is nothing wrong with smelling the smell is one of the methods to see its environmental protection, but the more direct and professional method is to see whether its environmental protection indicators meet the standards, such as the content of VOC, the amount of free formaldehyde, etc., if conditions permit , Consumers can even bring a professional formaldehyde test box or tester to test on site, so that the purchase is foolproof.

 

Misunderstanding 2: Anti-crack paint = certain anti-crack

 

After using the painted wall for a period of time, cracking will appear more or less, and many people try their best to choose a good paint to solve the problem of cracking. Some paint brands on the market have launched anti-cracking products. Consumers are immediately attracted by these two words, thinking that the wall surface must be anti-cracking when the paint is bought back. Such misunderstandings often occur around us.

 

Selection method: Good-quality paint can slow down the cracking speed of the wall to a certain extent, but in addition to the anti-cracking effect of the paint, construction and maintenance are also key factors for the wall's crack resistance. Recall that a thin layer of paint film can prevent the wall from cracking. This statement is a bit exaggerated. The "elastic latex paint" on the market can generally only make up for micro-cracks below 0.3mm. If the wall has been cracked, use latex paint to make up, or use cement to fill the cracks, and then paint.

 

Myth 3: The color of the color card = the color on the wall

 

When buying paint, consumers will use the color on the color card as a reference. Many people have the misunderstanding that the color on these color cards is the same as the color of the actual wall. Due to light reflection and other reasons, after painting the walls of the room, the color will be a little darker than the color shown on the color card. If you encounter poor quality paint, the difference between the actual color and the color card will be greater.

 

Tips for selection: In order to avoid a large deviation between the color of the purchased paint and the expected color after it is applied to the wall, it is generally recommended to choose the color you like and buy a color that is one size lighter, so that the wall effect will be closer to you favourite colour.

 

Myth 4: High price = good quality

 

Price is an important reference index for purchasing paint, and many people have the misunderstanding that a paint with a high price must be good. These consumers usually think that the higher the price of the paint, the better, which proves that the paint is genuine, so when buying, they only choose expensive ones.

 

Selection tips: the higher the price, the better the quality. Consumers can use the price as a reference when buying paint, but it is more important to choose a reputable brand and test the quality of the paint in addition to considering the price.

 

In home decoration, paint construction accounts for 80% of the entire decoration area, and the paint almost covers the entire home, so it should not be taken lightly when choosing. Numerous experiences tell us that there are many misunderstandings in the selection of coatings, such as safety, crack resistance, color, and quality. These properties are equated by some wrong information, leading to wrong selections. As a savvy consumer, you must see the essence and don't be fooled by these equivalent concepts.

Exterior wall paints are basically divided into latex paints, elastic paints, texture paints, real stone paints, colorful paints, metallic paints (less used at present); others, there are some special processes, such as fair-faced concrete effects, such as finished products The panels with imitation sandstone effect are pasted directly.

 

1. Exterior wall latex paint:

 

(1) The price ranges from 30 to 100.

 

(2)  It only has a cleaning effect, and a good latex paint will still be as new after a few years. No elasticity, no anti-cracking effect.

 

(3) It can only be used in Guangdong, Hong Kong and other areas without external wall insulation. And more commonly used for old building renewal (settlement of old buildings has been completed).

 

2. Elastic coating:

 

(1)  It is used in areas with external insulation. Because the external insulation is spliced by plates, it will be dislocated with the settlement of the building, which will cause dislocation tension of the exterior wall coating and crack the coating. Therefore, it is necessary to make the exterior wall coating elastic and anti-cracking (resin).

 

(2) The price ranges from tens to hundreds of yuan, the main difference lies in the different quality of the resin used. The price of conventional elastic coatings is about 40 yuan including labor and materials, and this one is a little more.

 

(3) There are two types of elastic coatings: a single-layer and a multi-layer. When it originated in Japan, there was only multi-layer bomb coating, that is, the interlayer that acts as an elastic anti-cracking layer + the surface layer that functions as a cleaning function. This kind of bomb coating is more expensive, so after entering the Chinese market, a single-layer bomb coating was developed, which is about two The two functions are integrated into the surface layer. The cleaning function and anti-cracking function of bomb coating are actually a pair of contradictions, and different brands will have different emphasis (materials with good elasticity, such as certain viscosity, will have the ability to absorb pollutants, and their plot performance will decline).

 

(4) According to the project shape and construction technology, it can be divided into flat paint, small garland, large garland or embossed shape, but its texture is more monotonous than texture paint.

 

(5) As shown in the figure, it is a kind of relief modeling, which adds a layer of special relief modeling layer under the surface layer.

 

(6) Mud coating falls off, often due to quality problems such as putty and confidence, or due to water seepage.

 

3. Metallic paint:

 

(1) It is mainly the effect of imitating aluminum plate.

 

(2) There is no elastic effect, so it is not suitable for areas with external insulation.

 

(3) If it is necessary to add an elastic layer: it can prevent cracking, but it lacks a metallic feeling.

 

4. Real stone paint:

 

(1) The material of real stone paint is mainly made of crushed natural stone particles. Real stone paint is generally divided into single color or multi-color (also called multi-color, which is different from colorful stone). The price of real stone paint is basically more than 100, and the domestic brand is 70 yuan. There are more left and right.

With the improvement of people's living standards and the pursuit of environmental protection, water-based coatings for home decoration have developed rapidly. So what is the difference between water-based paint and traditional oil-based paint? Let us uncover the answer below.

 

Element

 

Oil-based paint is a type of paint with dry oil as the main film-forming substance, mainly including clear oil, thick paint, oil-based blended paint, oil-based anti-rust paint, putty, putty, etc.

 

Water-based paints are paints that use water as a solvent or as a dispersion medium, including water-soluble paints, water-diluted paints, and water-dispersible paints (latex paints). Water-soluble coatings use water-soluble resins as film-forming materials, represented by polyvinyl alcohol and its various modified products, in addition to water-soluble alkyd resins, water-soluble epoxy resins, and inorganic polymer water-based resins.

 

Environmental friendly

 

Water-based paints use water as a diluent, which is harmless to human health, while oil-based paints use banana water and thinner as diluents, which contain xylene and other harmful carcinogens.

 

Water-based paint is odorless and can be inhabited after painting. Oil-based paint has a strong pungent taste, and the gas also contains a lot of harmful substances. About one or two months after painting, the strong irritating smell can basically be volatilized and tasteless, but the harmful gas will be slowly released and volatilized for about 10 to 15 years.

 

Value for money

 

Water-based coatings have relatively high technical requirements in terms of drying time, hardness, and plumpness. The manufacturing process is relatively complicated, and large-scale production equipment is required to produce products with relatively stable performance, and the production cost is relatively high. This is also the reason why the price of water-based paints of the same grade is much higher than that of oil-based paints.

 

Durability

 

Water-based wood coatings are not as good as oil-based wood coatings in terms of hardness, fullness, and aging resistance. Consumers who have high requirements for the home environment may even redecorate after three to five years. Due to the low wear resistance of general water-based paints, most consumers choose to use water-based paints only on the walls, and use oil-based paints for frequently scrubbed parts such as doors, windows and furniture.

 

Construction performance

 

There are no special requirements for water-based paint, and you can paint and repair according to your own needs after simple training. Oil-based paint must be professionally trained and practiced to have a good brushing effect.