The desire to make a car unique and noticeable in the flow often leads owners to experiment with the car. paint-coated. One of the most effective ways to change the visual perception of the body is to add special pigments to the base enamel. Powder in paint for cars This is not just a decorative element, but a complex chemical mixture that requires accurate compliance with the application technology. Modern pigments allow you to turn a standard color into a deep, iridescent shade, which changes its saturation depending on the angle of view.
Many motorists mistakenly believe that it is enough to just pour the contents of the bag into a jar of paint and mix. The preparation process is in fact base-layer It requires strict control of proportions, solvents and environmental conditions. Incorrect mixing can lead to defects such as shaking, matteness, or uneven distribution of particles. Understanding the physics of the process and the chemical composition of pigments is key to achieving the ideal result.
In this article, we will take a closer look at what types of supplements exist, how they interact with acrylic and polyurethane bases, and why. the size of mica particles directly affects the depth of color and cover. You will learn about the intricacies of working with mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of stone, and modern effects like “chameleon”, as well as how to avoid common mistakes when painting.
Classification of Powder Pigments for Cars
The auto-enamel market offers a wide range of additives, each of which creates a unique optical effect. Most of them are micas, covered with metal oxides. Pearl pigments They work on the principle of light interference: light rays are reflected from different coating layers, creating a soft glow. Such additives are often used to create noble white, black and pastel tones.
Unlike mother of pearl, metallized They contain aluminum particles. They give a sharper, sparkling shine and are often referred to as "silver" or "metallic." There is also a category xeralic Large particles of irregular shape, which create the effect of a “starry sky” or granite crumb. Their use requires special skill, as they can create relief on the surface.
Special attention should be paid to pigments with the effect of “chameleon” or “color shifting”. They contain a multilayer structure that changes color depending on the angle of incidence of light. For example, a green tint can turn into blue or purple. Such materials are much more expensive than standard ones, but give an amazing result.
⚠️ Note: Using pigments from different manufacturers in the same mixture can lead to a chemical reaction and dissection of the paint. Always use supplements and a single line base or pre-test compatibility.
The choice of the specific type depends on the desired final effect and the type of car. For classic models, soft mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother, while for sports cars, bright metallic or complex multicomponent mixtures are more appropriate.
Mixing technology and necessary proportions
The process of making paint with the addition of powder is an exact science. The main rule is to comply with the proportions recommended by the manufacturer. paintwork. Usually, the amount of pigment varies from 5% to 15% of the total weight of the finished mixture, but these figures can vary depending on the density of the powder and the desired color saturation.
First, you need to prepare a clean container and a measuring glass. First, the base enamel or varnish is poured into the container, then a solvent is added to achieve working viscosity. Only after that is introduced. powder-pigment. It is important to add it gradually, stirring constantly to avoid the formation of lumps that can subsequently clog the spray nozzle.
After adding all the components, the mixture should be thoroughly mixed. To do this, it is better to use a construction mixer at low revs or a special stirrer for paint. Intensive manual shaking often does not allow uniformity, especially if heavy aluminum fractions are used.
A critical step is the filtration of the finished solution. Even microscopic lumps can ruin the whole look of a part. Therefore, before pouring into the spray gun tank, the paint is necessarily passed through the filter funnel with a grid. 125-190 microns.
- 🎨 Carefully shake the base enamel before adding pigment to lift sediment from the bottom.
- ⚖️ Use electronic scales to keep the proportions accurate, especially when working with expensive pigments.
- ⏳ Let the mixture settle for 10-15 minutes after mixing, so that air bubbles come out.
- 🌡️ Consider the temperature in the paint chamber: cold paint falls worse and dries longer.
Preparation of surface and equipment
The quality of the final coverage depends on preparation by 80%. Painting with powder additives is more demanding on the smoothness of the base than ordinary enamel. Any scratch, hole or defect of the putty will be noticeable under the layer of iridescent paint, as the light will reflect from them unevenly.
The surface should be perfectly ground, defatted and covered with soil. The soil should be chosen in the tone of the future paint or use a gray universal soil if a dark color is planned. Light ground may require more layers of base to overlap.
The equipment also requires preparation. The stain should be completely clean. It is recommended to use duces with diameter 1.3. to 1.4 mm for standard pearls and 1.5-1.6 mm for large fractional xeralics. The pressure at the outlet is usually set in the range 2.0-2.5 AtmThe exact values depend on the viscosity of the paint and the recommendations of the gun manufacturer.
☑️ Checking before painting
It is important to ensure that there is no dust in the room. Dust particles that have settled on a sticky layer of paint with metal will look like large defects. Using a paint camera or a carefully prepared garage with a moistened floor is a must.
Paint and varnish application process
The application of paint with the effect of metallic or mother of pearl differs from painting with solid (single color). Here, the technique of applying "wet wet" with mandatory interlayer drying is used. The first layer (fog) is applied very thinly to create adhesion and primary background. The pressure of the gun can be slightly increased, and the torch can be wider.
The second and subsequent layers are applied more tightly, but without the formation of subtexts. The main task is to distribute evenly. pigment. If you overdo it and apply a layer that is too thick, aluminum particles or mica can drown in the solvent and dispose chaoticly, which will lead to the appearance of spots (the phenomenon of “cloud”).
When applying mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of mother of heart. The tip of the gun can change the orientation of the particles and create stripes of different shades.
After drying the base (usually 15-30 minutes, depending on the temperature and type of solvent), it is necessary to apply varnish. Lacquer protects the pigment from oxidation and gives depth. For effects such as "chameleon" sometimes use tinted varnish or apply a base on a black glossy background for maximum contrast.
The number of layers of the base is usually 2-3. More layers are not recommended, as this can reduce the brightness of the effect and increase the risk of defects. Each layer should "grab" but remain sticky for better interlayer adhesion.
Table: Comparison of pigment characteristics
To make it easier to navigate in the choice of material, we give a comparative table of the main characteristics of popular types of powders. This will help you understand what effect you will get in the end and how complex the process will be.
| Pigment type | Particle size | The effect | Difficulty of application |
|---|---|---|---|
| pearl | 5-25 μm | Soft glow, depth | Medium |
| Metallic (Alu) | 10-50 μm | Bright shine, sparks | Low. |
| xeralic | 50-200 μm | Big glitter, relief | Tall. |
| chameleon | 10-60 μm | Change of color | Very high. |
As can be seen from the table, the larger the fraction, the higher the requirements for the skill of the painter and the condition of the equipment. Small particles of mother-of-pearl are more forgiving (forgive errors), whereas large xeralic requires a perfect torch.
Common Errors and How to Resolve Them
Even experienced craftsmen face challenges when working with complex pigments. One of the common mistakes is stripe-like (banding). It occurs when metal particles stack unevenly due to improper viscosity of the paint or too rapid drying of the solvent. This can only be corrected by completely re-painting and re-painting the part.
Another problem is “mottling”, when light and dark spots are visible on the surface. This often happens when applying too wet the last layer of the base or using too slow solvent in hot weather. Metal particles pop up and group together.
How do you avoid the apple?
Use a special solvent for metallics that regulates the orientation time of the particles. Apply the final layer of the base with a drier torch, from a greater distance, almost "dusty" the surface.
There is also a loss of shine after varnishing. This may be due to the fact that the base did not have time to dry before applying the varnish, and the solvent from the varnish “boiled”, raising pigment particles. Or the base layer was too thick.
⚠️ Warning: Never try to polish fresh metallic paint in the first days after painting. The particles can break out of the varnish, leaving micro-scratches.
Care for coating with powder effects
A car painted with the use of metallized or pearl paints, requires careful care. The structure of such coatings is more complex than that of solids, and aggressive chemistry can damage the varnish or the pigment itself. The wash should be soft, using shampoos with a neutral pH.
To protect the effect, regular application of wax or ceramic coating is recommended. This fills the micropores of the varnish and creates an additional slippery layer that prevents dirt from sticking. In addition, the protective layer enhances the depth of color and shine. metallic.
Regular polishing with protective compounds (once every 3-4 months) prolongs the life of spectacular coatings and maintains color saturation for years.
When chipping on such coatings, repair is difficult. It is extremely difficult to choose the exact shade, taking into account the orientation of the particles, so it is often necessary to repaint the entire element or use complex retouching technologies.
In conclusion, it is worth noting that powder in paint for cars is a powerful tool of tuning. It allows you to change the appearance of the car beyond recognition. However, this requires not only financial investments, but also a high level of training of the performer. Don’t be afraid to experiment, but always start with trial metal or old parts.
FAQ: Frequently Asked Questions
Can I add a powder pigment to the finished acrylic paint?
Technically possible, but the outcome is unpredictable. The finished acrylic enamel already has a formed structure. Adding pigment will upset the balance, the paint may curl up or lose adhesion. It is better to use special swayed bases.
How much dried paint with mother of pearl before varnishing?
The drying time depends on the temperature and type of solvent. On average, at +20°C, it takes 20-30 minutes. The surface should become matte and stop sticking to the finger in the glove, but at the same time retain the ability to interlayer coupling.
Why did the metal disappear after the varnishing?
Most likely, the base layer was applied too wet, and the metal particles drowned in the solvent, or too aggressive solvent was used in the varnish. Also, the reason may be insufficient exposure of the base before the varnish.
Do I need to grind the base before applying the varnish?
No, you can't grind the base. If dust falls on it, it is carefully removed with a sticky napkin. Grinding will destroy the orientation of the particles and spoil the effect. The stain is placed on a base that is not dry (but lying down).