How to properly cover the wood with varnish: the choice of materials. Drying time, technology of applying water varnishes. Application of a varnish in combination with a mordant
- 22 Oct 09:00
- Repair Of
- 1 Selection of LCM
- 1.1 Drying time
- 1.2 Application of water-based lacquers
- 1.3 Application of varnish in conjunction with a softener
- 2 Conclusion
Coating of wooden products with varnish is one of the most common methods of decorative treatment of painted and unpaintedsurfaces. The use of varnishes is a versatile method of treatment, as it is suitable for most types of wood, regardless of the density of materials and their texture. This method of treatment is widely used in the manufacture of furniture, in the finishing of buildings made of lumber, etc.
When planning to purchase varnish for wood, it is necessary to understand that the quality of the finished result largely depends on a number of conditions, among which: the degree of preparednessthe surface, the correctness of the choice of varnish in accordance with the type of wood, compliance with the technology of LFM.
floorboard processing In this article we will discuss the features of the choice and application of varnishes in combination with the use of pigmentation compositions for wooden surfaces.
A wide range of paint and varnish materials is presented, but not all of them are intended for the processing of lumber.
For application on wooden surfaces, the following varieties of LKM are used:
- Alkali lacquers - are transparent and translucent coatings that add luster, protect the surface of the black from the negative influence of environmental factors. Correctly selected coating, if applied correctly, can isolate the texture of fibers and enhance the tone of the tree, which guarantees obvious advantages in furniture processing.
Alkali-based varnish is a complex solution containing film-forming substances such as shellac, sandarak, digging or synthetic resins. Ethyl alcohol is used as a solvent.
Mixture containing digestive and sandarak can be supplemented with anilin dyes that are soluble in alcohol. As a result, it will be possible to get transparent color varnishes that will change or vice versa to emphasize the color of the surface.
Separate varieties of alcoholic LMBs are polystyrene. Such compositions contain about 30% shellac resins and 70% ethyl alcohol.
Important: In order for alcoholic varnishes to form a sufficiently strong coating, the strength of the alcohol used must be at least 90 °.
- The low-priced varnishes are complex mixtures that consist of a number of resins and pigments that are sealed in oil.
The finished varnish has a liquid or semi-liquid consistency, and can therefore be applied with a brush or roller. After application, the solution dries, forming a transparent film on the surface, resistant to atmospheric precipitation and mechanical stresses. Therefore, oil varnishes for wood impregnation are an excellent tool for treating country furniture, which most of the time is spent in the open air.
Important Most oil-based varnishes have a characteristic yellow tinge that does not disappear after a complete drying of the applied layer.
- Nitrocellulose varnishes( nitrolocks) are warehouses based on nitrocellulose diluted in organic solvents.
Important: Taking into account the toxicity of the vapors when drying nitrilaks, during use, it is necessary to apply a respirator and work in well-ventilated areas.
spray gun Nitrils, irrespective of how they are applied, form a smooth and hard coating that is resistant to UV radiation and mechanical stress. LKM on the basis of nitrocellulose long dry, to accelerate the process of drying in the composition of increased content of organic solvents.
Due to the toxicity of organic solvents, the share of nitrol oxide production in comparison with the volume of production of similar compositions on the alcohol and water basis decreases.
- Water-based varnishes are mixtures made with acrylate base, sealed in aqueous medium. The fine-dispersed acrylate base is not soluble in water, but is a suspended particle. Therefore, before application, the product is thoroughly mixed.
. When applied to wood, the paint varnish layer dries to form a solid hard coating. After a complete drying, the treatment layer exhibits water resistance to UV radiation and mechanical stresses.
Water-based varnishes are widely used in the modern furniture industry, as well as in the interior and exterior of building objects made of lumber. The essential advantage of water varnishes is their environmental safety, and therefore finishing work can be carried out without a respirator.
So, we looked at the main varieties of LKMs that are suitable for lumber processing, and you can decide what lacquer to cover a wooden door or other wooden surfaces.
In order to know exactly what lacquer to cover a wooden table, you need to have a general idea of the rate of drying. You can see these parameters in the following table.
Name of LKM Drying to the offset Drying to the next layer Complete drying of varnish Nitro lattices 30-60 min.3-5 hours 1 day Oil linings up to 10 hours to 12 hours 1 day Alcohol varnishes 5-6 hours to 12 hours 1 day Water varnishes 1-2 hours 3-5 hours 16-18 hours Polyurethane varnishes 1 hour 3 hours to 12 hours
Water-based paint technology
After we have decided on the choice of funds, it remains to find out how to properly cover the wood with varnish. As an example, let's consider the features of using acrylic water based paints.
Instructions for finishing works are as follows:
- At the initial stage, preparatory work is carried out, during which the surface is brought to the state optimally for application LFM.
First, the surface is plucked out to remove irregularities and contaminants, and then the products that are processed in this way are limited by a brush to remove dirt and dust.
If there are areas affected by mold on the surface of the wood, it is necessary to use special bleach and usual antiseptic solutions. After completion of the preparatory work, it is necessary to withstand the product in the room so that the moisture content does not exceed 10%.
- At the next stage, carefully mix the varnish, bringing its consistency to a homogeneous one.
Important: All subsequent work must be carried out at an air temperature not lower than +10 ° C.
- We apply lacquer coating for a tree using a brush or roller. The tool runs along the direction of the fibers in order to emphasize their texture.
After applying one layer, wait for the time it takes to dry off. After that we inspect the surface on the uniformity of the coating.
If the layer is unevenly taken into wood, wait until it is completely dry, after which we apply a varnish again with a thin layer. When working with paint of wooden furniture, it is possible to apply LFM in several layers, up to obtaining the optimal appearance of the coating.
Important: If the finishing work is carried out on surfaces with a large area, the applied composition should be diluted to obtain a more fluid consistency and used in conjunction with the paint spray.
Application of varnish in conjunction with
The coating of wood with mordant and varnish is a unique opportunity to provide ordinary wood species of rare and, consequently, expensive rocks. The choice of a moisturizer depends on the type of varnish used.
As an example, we will consider the technology of applying a single-component water mordine with the subsequent application of water lacquer. The choice of finishing materials is not accidental, since the water compositions are easy to apply and can be applied with their own hands using the usual flywheel.
Instruction on how to properly cover a tree with a nylon and varnish is simple. The brush is smeared in a cream and applied on a pre-prepared surface along the fibers. Applying the composition carefully rub it with a brush so that it penetrated into all the depths.
Mortar, absorbed into a tree, will give an uneven shade: it will be lighter between the fibers, and it will darken on the tops of the fibers. This is due to the different density of the tree.
In order to align the shade, you can apply a second layer of cream. But, if you want to see the invoice, it is better to do one layer. After full brushing and drying of the marmalade, you can apply varnish.
Now you know how to cover the wood with varnish. Any questions left? You can find more useful information by looking at the video in this article.