Glass spray painting techniques and principles

First, the glass bottle paint spray construction skills:

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1, with a clean thinner or water will be transferred to the appropriate paint coating viscosity, measured by the coating -4 viscometer, the appropriate viscosity is generally 18 to 30 seconds. Such as the moment there is no viscometer, the visual method can be used: bar (bar or stick) to stir the paint after the stir to 20 cm high to stop observation, such as paint in a short time (a few seconds) within the line, then Is too thick; such as a barrel from the edge of the line is too thin; to 20 cm high stop, the paint into a straight line, instantly cut into the drop down, the viscosity is more appropriate.

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2, the air pressure is best controlled at 0.3-0.4 MPa (3-4 kgf / cm2). The pressure is too small, poor spray paint, the surface will form pitting: the pressure is too large easy to hang, and the paint mist is too large, both a waste of material and affect the health of the operator.

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3, the nozzle and the surface of the general spacing of 200-300 mm is appropriate Too easy to sagging; too far misty fog uneven, prone to pitting, and the nozzle away from the surface of the long fog on the way to cause a waste of waste. The size of the interval should be based on the type of glass paint, viscosity and pressure to adjust the size of the appropriate. Slow dry paint spray interval can be far away, the viscosity is dilute when a little more; air pressure is large, the interval can be far, the pressure can be close to a little time; the so-called far point is far between 10 mm -50 mm range adjustment, If this range is exceeded, it is difficult to obtain an ideal film.

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4, the gun can be used up and down, about to move, the best 10-12 m / min speed uniform action, the nozzle should be flat in the surface spray, try to reduce the oblique spray. When sprayed at both ends of the surface, the button to pull the gun hand to quickly loose, so that the paint mist reduced, due to both ends of the surface, often to accept more than two spray, is the most likely to cause sagging place.

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5, when spraying to the next one to suppress the 1/3 or 1/4, so that it will not leak phenomenon. Spray fast-drying paint, the need for a spray in the order. Filling effect is not ideal.

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6, in the outdoor open place to spray, pay attention to the wind (wind should not work), the operator to stand in the direction of the wind, to prevent the mist from the wind has been sprayed on the film caused by shame on the granular surface.

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7, the order of spraying is: first difficult after the first, after the first outside. The first high after the low, the first small area after a large area. This will not cause the spray after the spray fog spray has been sprayed on the film, damage has been sprayed good film.

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Second, the glass bottle paint color techniques

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1, the basic principles of color

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Red + yellow = orange

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Red + blue = purple

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Yellow + purple = green

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2, the basic principle of complementary color

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Red and green complementary, that is, red can reduce the green, green can reduce the red;

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Yellow and purple complementary, that is, yellow can be reduced purple, purple can reduce the yellow;

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Blue and orange complementary, that is, blue can be reduced orange, orange can reduce the blue;

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3, the basic knowledge of color

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Ordinary people say the color is divided into three elements: the color, brightness and saturation. Hue, also known as hue, that is, red, orange, yellow, green, blue, purple,

Brightness, also known as brightness, describe the degree of color and shade; saturation, also known as saturation, describe the depth of color.

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4, the basic principles of color

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Do not use more than three kinds of paint.

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With red, yellow, blue three colors in accordance with a certain proportion of mixing can be different in the middle color (that is, different colors of color).

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In the basic color of the basic, add white, you can get a different degree of saturation color (that is, different shades of color).

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On the basis of the original color, add the black, you can get different brightness (that is, the brightness of different colors).

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5, basic color skills

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Tips 1, the color of the paint mixture to follow a subtractive principle, the three primary colors are red, yellow, blue, their complementary colors are green, purple, orange. The so-called complementary color that is two kinds of shade according to a certain percentage of mixed white shade, red complementary color is green, yellow color is purple, blue color is orange. That is, if the color is too red, you can add green; such as yellow can be added purple; such as blue can be added orange.

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Skills 2, before the color, according to the following figure to determine the need to deploy the color in which the location of the figure, and then use the two similar hue by a certain proportion of deployment can be.

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Skills 3, with the same piece of glass bottle material or to be sprayed on the workpiece for color (the thickness of the substrate, sodium salt glass bottles and calcium glass bottles will show different results).

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Skills 4, the color, the first to add the main color, and then to the strong color of color as the deputy, slowly interrupted and continue to add, and constantly observe the color changes, sampling wiping, brush, spray or stained Clean on the model, and other colors after the stability of the original model with color, in the entire color process must grasp the "shallow by the deep" principle.