Does latex paint contain formaldehyde? How to choose latex paint

Latex paint is the most frequently used paint for home decoration, which is used to beautify the most beautiful and beautiful home in one's ideal. However, relatively speaking, some friends do not know much about how to choose latex paint and what to pay attention to when applying latex paint. Today, Encyclopedia Knowledge Network will help you solve the little troubles in your life. Let's take a closer look!

Contents of this article

1. Does latex paint contain formaldehyde?

2. How to choose latex paint

3. What else should I pay attention to when applying latex paint?

Does latex paint contain formaldehyde?

Latex paint from regular manufacturers does not contain formaldehyde. Latex paint is a water-based paint, and its paint film performance is much better than that of solvent-based paint. Half of the organic solvents in solvent-based paints are replaced by water here, so the toxicity problem of organic solvents is basically completely solved by latex paint.

Latex paint is made of some polymer aqueous solution to form a membrane material. In addition to water and different types of safe and harmless polymers or polymers, it also contains a small amount of emulsifiers and trace amounts of unpolymerized free monomers. Free monomers are some volatile small molecules with varying degrees of toxicity. The concentration of free monomers in environmentally friendly paints is controlled below 0.1%, and the amount of additives used ranges from 2% to 3%; the amount used is only between 0.05% and 0.1%. Health.

There are many manufacturers that can produce latex paint. Except for a few companies that use organic mercury in mildew inhibitors and ethylene glycol in film-forming aids, most latex paint manufacturers are responsible to users and will not use substances that are harmful to the human body even if it increases costs. However, even these latex paints that add harmful substances have very low content of harmful substances. As long as you pay attention to ventilation after painting and move in after it is completely dry, it will not cause too much harm to the body. Consumers don't have to be afraid of tigers.

How to choose latex paint

1. Smell the smell

Smell the latex paint you have chosen. Truly environmentally friendly latex paint should be water-based, non-toxic and odorless, so if you smell irritating odors or fragrances, be cautious.

2. Place and observe

After being placed for a period of time, the surface of genuine latex paint will form a thick, elastic oxide film that is not easy to crack, while inferior products will only form a very thin film that is fragile and has a pungent smell.

3. Look at the texture

In addition, use a wooden stick to mix the latex paint evenly, and then use the wooden stick to pick up the latex paint appropriately. High-quality latex paint will form a fan shape when it flows down. Touch it with your fingers, and the genuine latex paint should be smooth and delicate.

4. Scrub resistance

It can be partially applied. Apply a small amount of latex paint to the cement wall, and wipe it with a wet cloth after the coating dries. High-quality latex paint has strong scrub resistance, while low-grade latex paint will fade after only a few wipes.

5. Check the outer packaging and environmental protection test report

Generally speaking, regular products will have their name, trademark, ingredients, instructions for use, etc. marked on the front. If not, it means it is a counterfeit product. In addition, you should also pay attention to its production date and shelf life. You can also ask the merchant to provide an environmental test report, etc.

6. Weigh the weight

Pick up the paint bucket and shake it to see if it makes any sound. If it makes noise easily, it means that the viscosity of the product is not enough and it is best not to buy this type of latex paint.

What else should I pay attention to when applying latex paint

1. The latex paint brand cannot be mixed

When working, it is best to use latex paint or other materials of the same brand and model. It is best not to use multiple brands at the same time to avoid color difference and quality problems.

2. Clean the painting tools daily

The used brush stick should be cleaned and soaked in cold water the next day to prevent it from becoming hard and dry.

3. The proportion of deployment shall be in accordance with the specification

The ratio of latex paint to water should be according to the instructions. Water should be added according to the actual situation and stirred evenly. The maximum amount of water added should not exceed 20%. Remember that it is inappropriate to be too dilute or too concentrated.

4. Pay attention to the interval between brushing times

The second coat of topcoat should be applied after the first coat of topcoat is completely dry, with an interval of about 1 hour. The temperature for latex paint construction should be at least 5 degrees Celsius. After painting, open the doors and windows and use fans to ventilate to accelerate the drying rate.

5. Choice of sandpaper

Sandpaper is divided into different grades according to the size of the sand particles. The higher the grade, the finer the particles, and the lower the grade, the coarser the particles. Different types of sandpaper are selected according to different processes during construction.

6. Avoid contamination to other locations during operation

When painting, it is best to use color separation paper to cover the joints of skirtings, doors, wardrobes, corner lines, etc. to avoid staining, and tear it off after completion.