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Compared with other coatings, the structure of water-in-water colorful paint is very complicated.
The complete water-in-water coating includes a composite coating formed by multiple functional coatings such as a primer layer, a middle coat, a main material layer, and a top coat layer.
Judging the quality of a colorful paint can not completely rely on a single surface workmanship, combined with a comprehensive inspection of each process can draw the most accurate conclusion.
Primer and topcoat are the two major surface coatings of water-in-water colorful coatings, which play a very important role in the overall adhesion and protection of the coating.
Generally, five main factors need to be investigated:
1.
Adhesion: The firmness of the paint film to the substrate is the adhesion.
Generally, the hundred grid method is used, and the adhesion is determined according to the degree of damage to the coating.
2.
Hardness: Hardness mainly refers to the resistance of the paint film against foreign objects.
The conventional test takes the Chinese pencil as the standard, and the hardness that can scratch the paint film is the critical hardness.
Generally, the paint film must reach at least HB hardness, excellent The paint film can reach 2H hardness com" href="http://">coating online coatingol.
com .
3.
Filling: An important feature of the primer is that it can fill small cavities on the exterior surface, which can generally be judged by the comparison method.
The high-quality filling performance can effectively reduce the number of primers and save materials.
4.
Dryness: The paint film feels sticky when touched with your fingers, but it can be judged as dry if you don't touch the hand.
If you press hard on the surface of the paint film, it will not leave indentation or damage to the paint film, and it can be judged as dry by finger pressure.
5.
Yellowing resistance: The yellowing resistance actually refers to the weather resistance.
When the alkaline exterior surface or direct contact with the air, the sulfur, benzene ring and other chemical substances in the coating react, and the paint film is prone to yellowing , Falling off phenomenon, mainly investigating weather resistance time.
Medium coating
The middle coating generally refers to the latex paint standard, the main
To investigate tensile properties, aging resistance, and scrubbing resistance
As well as alkali and water resistance.
Main material layer
The main material layer refers to the color layer of the water-in-water colorful paint.
The specific advantages and disadvantages can be investigated from the following aspects:
Appearance: Water-in-water colorful paint is mainly used to imitate granite stone.
In terms of appearance, it mainly inspects the level of colorist, the level of construction master spray gun and the material itself.
The most important factor in considering the appearance is the degree of simulation.
Constructability: paint pays attention to three divisions of materials and seven divisions of labor, no matter how good the materials are, the construction is in vain.
Different manufacturers have different material performance and quality, some are easy to construct and some are difficult to construct.
Of course, the colorful paint that costs labor and materials is not high-quality.
Stability: Water-in-water colorful paint itself is unstable.
Different manufacturers have different product shelf life.
Some projects with large engineering volume and long construction period have special requirements for the storage stability of colorful paint.
Generally, the storage time is less than 2 weeks.
Can be classified as inferior products.
Material consumption: The water-in-water colorful paint mainly relies on the irregularly scattered color points to form a granite effect.
The amount of the main material required for the imitation stone pattern is also different.
The average dosage is generally about 0.
25-0.
55.
When imitating the same pattern, the spraying effect is basically the same, so the smaller the amount of material, the better.
Matters needing attention in colorful paint construction
June to September of each year is the peak season for the construction of water-in-water colorful paints.
The high temperature and hot climate in summer can make the colorful paints of external walls better film, and the sunshine time is longer, the construction time is more sufficient, and the construction period can be effectively shortened.
Therefore, many buildings choose summer to carry out the construction of water-in-water colorful paint on the exterior wall.
1.
The drying and conjunctivation of water-in-water colorful paints need to be carried out at a certain temperature and humidity.
2.
3.
4.