What does the brushing rate in paint mean, and what is the difference between spraying and brushing

The contrast ratio is an index used to evaluate the covering ability of the product in the national standard, and the specific operation is: prepare a 100 micron thick paint film on the standard polyester film or black and white grid paper, and dry it for 24 hours under laboratory conditions, put the polyester film on the black and white ceramic plate, use the reflectance tester to measure the emissivity respectively, and the emission data ratio of the black board and the white board is the contrast ratio. The stronger the coverage rate of the product, the smaller the difference between the data on the blackboard and the whiteboard, and the ratio is close to the dry covering power and wet covering rate of paint products.

Therefore, the evaluation of the coating coverage rate can not only look at the feeling of construction (the quality of wet covering power), the key is to see the hiding power of the paint film after drying. The hiding power of wet products reflected in the ratio can reflect the final use effect of the paint.

I really hope to be recognized, my recognition is my biggest motivation, I will continue to work hard!

You can understand how much wall can be brushed with a bucket of paint, for example, 1 bucket of 20L interior wall paint can be brushed about 70 square meters of interior wall surface, and 70 square meters here is the brushing rate of a barrel of 20L interior wall paint.

Repham Smart Coatings answers your lookouts.

The coating rate of the coating refers to the average coating area per kilogram of the coating, such as latex paint, with the same way of construction, the average coating area per kilogram of latex paint is larger than the general quality of the general latex paint, of course, the decorative effect of the paint is more, the latex paint is now a variety of varieties on the market, it is best to choose a more famous brand with guaranteed environmental performance (such as Bards), to the local paint brand store to buy, At the same time, the after-sales service is also more guaranteed.

That's the area that can be applied to 1 liter of 1 kilogram of paint.

The coating rate is the coating unit in the process of applying the coating, in addition to requiring the coating manufacturer to provide the necessary quality test data, but also often requires the physical parameters of the product use, one of the most important is the theoretical coating rate of the product, in order to calculate the amount of paint used and calculate the construction cost.

In China, the concept of usage was used in the past, that is, the amount of paint required to obtain a certain thickness of paint film per unit area, which was expressed as "g m 2".

In recent years, with the increasing number of domestic and foreign exchanges, the use of internationally famous brand paint products in China has become more and more common, and the concept of coating rate has also been accepted by many users, that is, "m 2 l" to represent the amount of product used.

Since there is no unified method and error requirement for determining coating rate in China's existing coating test method standards, we have explored and compared several measurement methods in combination with our daily work.

Spraying method

Some products are mainly sprayed on the construction site, and some diluent must be added to achieve satisfactory application viscosity, so we first measure the amount of paint used according to the dilution ratio, and then convert it to the coating rate expressed in "m 2 l".

The above content is from Encyclopedia-Coating Rate

It mainly depends on how thick the coating is, and the coating rate of different types of paint is also very different. The main thing to calculate is to know the specific gravity and volume of the solid content of the paint.

Firstly, according to the standard "GB T1758 1979 (1989) paint usage determination method", brush a certain thickness and a certain area of paint film on the unpolished flat steel plate, immediately after brushing, use the reduction method to weigh the brush amount (to 0 001 g), place the paint test plate for 24 h, and calculate the amount of paint used according to the following formula: x = (m 1 -m 2) s 10 4 formula: x usage, g m 2; m l Paint brush and container containing specimen before painting, g;

m2 Mass of paint brush and container containing specimen after painting, g; s Painted area, cm2. In order to convert to the coating rate (m 2 l), the density of the liquid paint needs to be measured, and the coating rate is calculated by the following formula: r = (1 x -1 ) 10 3 where:

r Coating rate, m 2 l;

x Usage, GM2; p Density of liquid paint, g ml. Then use a magnetic thickness gauge to measure the average thickness of the paint film on the sample (m), and calculate the theoretical coating rate under the required dry film thickness according to the following formula: theoretical coating rate = (coating rate average dry film thickness) The dry film thickness is measured in parallel for 3 times, and the arithmetic average of the results is taken close to 2 times.

Spraying methodSome products are mainly sprayed on the construction site, and some diluent must be added to achieve satisfactory construction viscosity, so we first measure the amount of paint used according to the dilution ratio, and then convert it into the coating rate expressed in "m 2 l".

The mass of the plate is first weighed on a balance with an inductance of 0 01 g, and then the diluted specimen is sprayed and the plate mass is immediately weighed.

Multiply 1000 by the actual volume solids percentage of the paint used, expressed as a decimal.

The theoretical coating rate refers to the area (square meters or square feet) that can be applied per liter of paint and coating on a smooth surface without loss, and the unit is square meters (L). Due to different uses, different types of coatings, the dry film thickness of the coating is not the same, so its theoretical coating rate will also change accordingly, the calculation formula is: theoretical coating rate = (volume solid content 10) dry film thickness.

The theoretical coating rate is derived based on the volume of the paint of 100% solids, if the volume of the paint is 100%, the dry film thickness of 1 m per liter of paint can be applied to the coating area of l000.

Generally 250 grams square meters.

The thickness is different, the coating rate is also different, how much is the thickness of the dry film of the paint film!

Summary. Hello dear and happy to answer for you.

"Coating rate" is the area of a surface that is normally covered by a certain amount of paint or varnish on an appropriate surface, usually expressed in square kilometres or square litres. It is affected by many factors, such as the porosity of the coated surface, the shape of the structure, the construction method, the proficiency of the operator, the film thickness control, etc. I hope to help my dear.

What is <> coating rate?

Hello dear and happy to answer for you. "Coating rate" is the area of a surface that is normally covered by a certain amount of paint or varnish on an appropriate surface, usually expressed in square kilometres or square litres. It is affected by many factors, such as the porosity of the coated surface, the shape of the structure, the construction method, the proficiency of the operator, the film thickness control, etc.

I hope to help my dear. <>

<> hello! I am a raw heavy gypsum putty powder, I want to increase the coating rate of this product? How to prepare?

Hello dear dear, I'm happy to answer for you, please wait a few minutes, I'll answer your inquiry.

Hello dear and happy to answer for you. Considering the gypsum raw material itself, gypsum powder needs low bulk density, high strength and good stability, and some gypsum powder is difficult to make a formula with a high yield. Then find good vitrified beads, high strength, high closure of pores, low water absorption of glass beads, and then the amount of addition.

Hope it helps. <>

Hello dear and happy to answer for you. How to configure the method? Details have not yet been announced online. I still hope to go to some local manufacturers here to learn more about it, Xiaoqi is very sorry, I wish you good health, all the best! <>

The differences between spraying and brushing paint are as follows:

1. Spray paint. The painting machine is more expensive, and the construction is carried out with a spray gun, and the effect obtained by such a construction process is that the surface of the wall is smooth and smooth, the feel is excellent, and the fullness is good. Painting has the advantages of fast construction, good flatness, and poor texture.

The disadvantage is that the paint loss is relatively large, and the later maintenance is troublesome, because the later maintenance workers can no longer pull the machine to spray paint, and the texture of the wax dust is definitely different from the spray.

2. Paint. Using the brush construction process, the flat effect is obtained, but if the brush is not good, it will leave brush marks. The advantage of painting is that the construction is slower than the painting construction, but it has texture, pattern and easy maintenance.

The disadvantage of painting is that the roller coating effect on the large surface is different from the whisker in the lamp trough, and there is a difference in texture. However, the proportion of water added when painting must be controlled between 20% and 30%, not more than 35%, higher than this dilution ratio, after the completion of the painting is prone to depowdering, brother sagging, floating color, leakage and other problems.

The most latex paint on the market, but also the most practical, the base surface treatment of latex paint is the most important, most of the paint companies you buy paint from him will help you spray paint for free, but will not help you deal with the base surface This point should be paid special attention to.

The coating rate of paint is measured in kg m2 (microns), or liters m2 (microns). For example, the coating rate of a paint is microns), and its consciousness is to apply the paint to each square meter of substrate to obtain a 20 micron paint film. It is a unit of paint usage.

It is mainly determined by the density of the paint, but also by the solids. If the unit price of the paint is the same, the higher the coating rate, the better, because you use the same quality of paint, the higher the coating rate, the thicker the paint film after construction.

The coating rate of paint is measured in kg m2 (microns), or liters m2 (microns). For example, the coating rate of a liquid hole paint is microns), which means that a paint film of 20 microns can be obtained by coating the paint on each square meter of material.

It is a unit of imitation buried locust paint dosage. It is mainly determined by the density of the paint, but also by the solids.