How to use paint, what is the method of making paint?

There are generally four ways to use paint: brushing, rolling, spraying, and batching. Brushing is the most economical but time-consuming. The effect of rolling is relatively mediocre in all aspects, not the most material-saving, nor the best effect, but relatively speaking, this is a cost-effective construction method.

Spraying will be better, but it is not easy to repair. Batches work best, but are the most costly. However, if you batch it, you can not use too good paint, and the effect of ordinary latex paint is also very good.

In the grinding and dispersion stage, water or solvent and various additives are added to the dispersion tank, and after stirring evenly, pigments and fillers are added for mixing and dispersion, and sand grinding is carried out if necessary, so that it can reach its own primary particles, and can maintain long-term stable suspension in the system; In the paint mixing stage, a film-forming substance (base material) is added to the dispersed pigment slurry, which is fully mixed, defoamed, and the viscosity is adjusted. After the product is inspected, it is filtered and packed into storage.

Attention should be paid to the production of paint.

The coating production process is simple and the quality is easy to control, so the quality of the coating mainly lies in the technical content and cost. This problem is more complex, involving different types of coatings, process precautions or critical control points are also different, the basic is:

Cleaning of the working cylinder and the equipment used to avoid pollution; Pay attention to the feeding process, remember to add low viscosity to high viscosity, and do not add it the other way around; Pay attention to the dispersion time and shear forces; Pay attention to the name and quantity of the feeding material to avoid misdelivery; The wetting and dispersion of the effect pigment should be uniform, and it should be inspected before use.

The coating belongs to the organic chemical polymer material, and the coating film formed belongs to the type of polymer compound. According to the classification of modern chemical products, coatings belong to fine chemical products. Modern coatings are gradually becoming a multifunctional engineering material and an important industry in the chemical industry.

1. Check the wall of the room that needs to be painted with latex paint to see if the wall is solid and smooth, if there are large cracks and holes in the plastering layer of the wall, it should be dealt with in time.

2. Clean the wall surface with a steel brush before brushing latex paint, ensure that the wall is free of floating dust and floating soil, etc., clean up the concrete interface agent on the wall stick, try to ensure uniformity, wait until 2 hours later to see if it is dry, and you can scrape putty after drying.

3. The wall putty can be scraped twice, if the putty with poor flatness needs to be scraped several times, you can also consider scraping the plaster first and then scraping the putty, and the time of each scraping putty should be spaced between more than 2 hours before the next step of construction.

4. After 1 or 2 days after the putty is scraped, the putty grinding should begin, and the grinding time period can be selected at night, illuminate the wall with an electric light bulb, and check whether the wall is smooth while grinding.

5. After the putty is polished, clean up the floating dust on the lower surface, and then you can carry out the construction of the primer, the primer must be painted evenly, and the general brush can be done once, and the next step of construction can be carried out after the primer is dry, and the primer drying time is generally about 2 4 hours, depending on the primer.

6. After the primer is completely dry, start to brush the topcoat, the topcoat should be painted on both sides, and each topcoat painting must wait for the first time to be completely dry.

Look at the instructions, if it is diluted, you can brush it directly.

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The spraying method of pro-coating is as follows: 1. Use the matching thinner to adjust the coating to the viscosity of suitable spraying, and measure it with a coat-4 viscometer, and the appropriate viscosity is generally 18-22 seconds. If there is no viscometer for a while, you can use the visual method:

Stir the paint with a stick (iron rod or wooden rod) and then pick it up to a height of 20 cm and stop for observation, if the paint liquid does not stop in a short time (a few seconds), it is too thick; If the line is broken as soon as it leaves the upper edge of the barrel, it is too thin; When it is just stopped at a height of 20 cm, the paint liquid will form a straight line, and the flow will be cut off in an instant and become a drop down, which is a more suitable viscosity. 2. The air pressure should be controlled in megapascals (3-4 kgf square centimeters). If the pressure is too small, the paint liquid atomization is poor, and the surface will form pitting; Excessive pressure is easy to sag, and the paint mist is too large, which not only wastes material but also affects the health of the operator.

3. The distance between the nozzle and the object surface is generally 300-400 mm. Too close and easy to sag; The paint mist is uneven too far away, which is prone to pitting, and the nozzle is far away from the object surface, and the paint mist is scattered on the way, resulting in waste. The specific size of the distance should be adjusted appropriately according to the type of coating, viscosity and air pressure.

The spraying distance of slow-drying paint can be a little farther, and the distance of fast-drying paint spraying can be closer; When the viscosity is thick, it can be closer, and when the viscosity is thin, it can be farther away; When the air pressure is high, the distance can be a little farther, and the pressure can be a little closer; The so-called closer and farther is a small range of adjustment between 10 mm and 50 mm, beyond which it is difficult to obtain the ideal paint film. 4. The spray gun can be moved up and down, left and right, and it is best to operate evenly at a speed of 10-12 meters, and the nozzle should be sprayed directly on the surface of the object to minimize oblique spraying. When spraying to both ends of the surface, the hand that pulls the trigger of the spray gun should be quickly loosened to reduce the paint mist, because the two ends of the surface often have to be sprayed more than twice, which is the place that is most likely to cause sagging.

6. When spraying in an open place outdoors, pay attention to the wind direction (it is not suitable for operation when the wind is strong), and the operator should stand in the downwind direction to prevent the paint mist from being blown by the wind to the painted paint film, causing an unsightly granular surface. 7. The order of spraying is: first difficult and then easy, first inside and then outside.

First high and then low, first small area and then large area. In this way, the paint mist that is sprayed after spraying will not splash on the sprayed paint film and destroy the paint film that has been sprayed. Hope mine can help you <>

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