Painting process and matters needing attention

Painting process and matters needing attention

Painting technology and matters needing attention, painting engineering is an important part of decoration engineering, and painting technology is the key, so as the owner, you must know the painting technology and matters needing attention well before decoration, and you must not be careless.

Spray painting process and matters needing attention 1 Let me introduce the paint first. Paint is actually a general term for wood paint and latex paint. Among them, wood paints are divided into polyester paint and nitrocellulose paints. To put it simply, polyester paint has high construction requirements and strict and complicated proportioning. It feels good after single film formation, but it is not easy to repair after damage, and its yellowing resistance is unstable. If it is constructed at the same time as latex paint, yellow latex paint may appear; Nitrocellulose paint is simple and easy to construct, easy to repair after being damaged, and has good yellowing resistance, but it is thin after a single pass and feels better after a certain number of passes. Let's stop here for wood lacquer, and then introduce its construction technology in detail. Let's talk about the brushing method of latex paint first.

Choose the right tool:

Generally, there are three brushing methods: brushing, rolling and spraying.

1, brushing and painting with a brush is a widely used construction method.

Advantages: material saving, simple operation, easy operation, strong flexibility, strong adaptability to coating varieties, and can be used for general coatings.

Disadvantages: manual operation is labor-intensive and inefficient, and it is not suitable for quick-drying paint. If the operation is not skilled and the action is not agile, the paint film will also have defects such as brush marks, sagging and uneven brush. In short, the decorative effect of the paint film is very poor.

Scope of application: quick-drying volatile coatings.

2, roller coating, roller made of wool or other materials, dipped in lacquer cloth on the surface of the object for coating.

Advantages: high speed, suitable for large-scale construction and high construction efficiency of workers.

Disadvantages: corners are inconvenient to repair, easy to blister, and will have the same fish skin effect as pockmarked noodles, which is not welcome by people who don't like pockmarked noodles. Moreover, roller coating consumes nearly 20% more materials than brush coating, which increases the cost.

Scope of application: both.

3. Gas injection

Advantages: fast construction speed.

Disadvantages: it will leave many bubbles on the wall, and the effect is very poor.

Scope of application: outdoor.

4, high pressure airless spraying

Advantages: the obtained high-pressure paint is conveyed to the spray gun through the high-pressure hose, and the spray gun releases pressure to form atomization, forming a smooth and dense coating on the wall surface, and the paint film effect is excellent.

Disadvantages: it is not popular in China for the time being, and others are not popular.

Scope of application: all available

Second, clean up the wall, the old and new wall treatment is different:

1, new wall: the water content is very high, so it is not suitable to paint immediately, and the construction will be started after being put on hold for one month, otherwise the wall will easily crack.

2、

Old wall: clean the floating particles, garbage and oil stains on the surface with wire brush and putty knife first, and then dry them; If there is unevenness on the wall, clean it and scrape it with putty to fill the gap.

There is a saying in the decoration industry: "whether the painting project is good or not depends on the paint for three points and the painting for seven points." Therefore, it is very necessary for the owner to know how to paint effectively.

Painting technology and matters needing attention II. Coatings are used in many fields, such as metal topcoat, wall paint, wood paint and so on.

Varnish construction technology

Polishing the base (cleaning the wood surface → polishing with sandpaper, smoothing and polishing, and cleaning with wet cloth); Brush the varnish for the first time (with thinner, the paint film dries quickly); Blow putty for the first time and polish it with sandpaper (putty repairs nail holes and gaps); Brush the varnish for the second time and polish it with fine sandpaper; Brush the varnish for the third time and polish it; Wooden at least 5 times, polished with water sandpaper, waxed and polished. Note: interval until dry. 6 hours in summer and 24 hours in winter. Keep the site clean and free of dust. The temperature is above 5 degrees Celsius.

Construction technology of mixed color paint

Polishing the base (cleaning the dust on the surface of the base, repairing the base and leveling with sandpaper); Scrape putty for the first time (putty, varnish, gypsum and powder water are mixed at 3: 6: 1) → polish → brush primer (main paint: curing agent: diluent 1: 0.5: 1, the thickness of primer is about 1 cm, and it is dried for 4 hours) → Diluent increases dryness, too thick for construction, too thin for adhesion) → Fill putty for repair → Grind and wipe for the third time, brush the top coat for the second time → Grind → Trim for the third time → Grind and wax.

Technological process of home coatings

1. Prepare materials and clean them.

The first thing is to prepare the things and materials needed in the process of painting. First, paint is essential, and the use is not much to say; The second is frosted paper, which can be bought in the market and is very cheap. The function of abrasive paper is to clean the surface of the object that needs painting and polish it for as long as possible to polish the surface of the object.

2. Start the construction.

When you are ready to start work, it's time to show your fists. This is the time to look at the real smearing skills. Apply the pigment and paint brush prepared in advance to the surface of the object neatly and evenly. Try to paint it all at once to avoid post-treatment. If you deal with it later, there will be no first time.

3. Place ventilation equipment.

After all painting operations are completed, it should be allowed to air dry. Attention should be paid to protect the coated object from contact with other objects, so as not to affect the coating effect of the object and pollute other objects. The air should be kept dry and ventilated until it dries naturally.

More and more families begin to like their DIY homes. Painting furniture is a good DIY project, but it looks simple. In the process of operation, we should also pay attention to the toxic paint, which has a strong stimulating effect on the respiratory tract. Pay attention to ventilation during construction, clean up the surrounding environment and prevent dust.