Why shouldn’t acrylic varnish be coated with alkyd?

What is fluoride varnish?

Fluoride varnish for teeth is a product that promotes the remineralization of enamel, enriching it with such a useful element as fluoride. After applying the composition to the enamel, a film is created that protects it from bacterial attack and makes it stronger.

Important! The main purpose of fluoride compounds is to fight carious bacteria. Fluoride is known for its antibacterial effect; it has a detrimental effect on pathogens, prevents the process of processing sugars and the release of acids by bacteria that destroy enamel.

The product is specialized and is used in dentistry for therapeutic and prophylactic purposes, but it can also be freely purchased through some pharmacies. The active ingredient in the base is sodium fluoride. Also today, preparations with aminofluoride are presented - this is a new generation fluoride compound, for example, it is the basis of a remedy for. Different manufacturers also contain various auxiliary components: shellac, chloroform, ethyl alcohol, fir balsam.

Most often, the drug is produced in darkened bottles of 11-25 ml. It looks like a thick transparent liquid. The kit includes a brush or applicator for application.

What to choose from: varieties of varnishes

The external selection criterion is the type of surface, which can be matte, semi-matte or glossy. You can be guided by the complexity of the composition, and according to this criterion, varnishes are divided into one-component (with acrylic as a base) and two-component, with an epoxy, alkyd or polyurethane additive. The composition classification is as follows:

• Acrylic varnishes. Homogeneous, ready-to-use, water-based liquid, transparent or milky in color. Used to protect wooden surfaces and for decorative finishing.

Water-based varnish for furniture and walls Source domingo.su

• Oily. The composition includes natural and artificial resins dissolved in turpentine (turpentine). Oil varnish is ideal for wood that absorbs oil mixtures well. The main disadvantage is the long (sometimes up to several days) drying time.
• Alkyd. They are obtained by mixing synthetic resins in organic solvents. Suitable for treating surfaces indoors and outdoors. They are convenient because they can be applied with any tool: brush, roller, spray gun.
• Nitrovarnishes (nitrocellulose). This is a solution of chemical components in a mixture of volatile organic solvents. This leads to the main properties: fast drying, good adhesion, toxicity (respirator required). Before starting work, a paint compatibility test is carried out.
• Polyurethane. Wood options have a reputation for reliable, durable finishes, regardless of wood species. They protect well from all types of influences, mechanical and weather. The disadvantages of the polyurethane composition are the high cost, multiplied by the complex application technology.

Glossy alkyd varnish for furniture Source absolut-dostavka.ru

• Epoxy. Epoxy resin in an organic solvent creates a durable waterproof layer, therefore it is used for varnishing wood in damp rooms (for example, in a bathhouse). The epoxy varnish layer can withstand alkaline environments, but lacks aesthetics.

Indications and contraindications for the use of fluoride varnish

Why do they coat teeth with fluoride varnish? This is primarily done to prevent caries. But this drug has many other indications for use:

• enamel hyperesthesia,
• wedge-shaped defect,
• demineralization of enamel,
• hard tissue injuries,
• ultrasonic teeth cleaning,
• living in regions where there is a small amount of fluoride in drinking water,
• prosthetics: the drug is applied to the tooth before installing a crown to strengthen it,
• after curettage of periodontal pockets: for treatment of the tooth neck,
• high susceptibility to caries: dental treatment with fluoride varnish is recommended for those patients whose enamel, due to age or other circumstances, is thin and fragile - children (especially when the baby bite has just changed to a permanent one), elderly people, breastfeeding and pregnant women.

The drug should not be used by people with individual intolerance to its components, with allergies, with renal failure, with toxicosis in pregnant women, as well as those who suffer from endemic fluorosis (when the fluoride content is already “off scale” in the hard tissues of the body).

How is the procedure performed?

To obtain the most effective result, it is recommended to coat teeth with fluoride varnish in a dental office. Firstly, before this, the doctor will prepare the “soil” for the beneficial effects of beneficial substances - he will carry out a professional hygiene procedure and remove bacterial plaque. Secondly, all actions will be carried out according to strict regulations, guaranteeing the safety and quality of the work.

So, the doctor coats the teeth with fluoride varnish after professional cleaning. This is done as follows:

• first, the specialist isolates the teeth from the gums and soft tissues that are adjacent to them,
• the enamel is thoroughly dried,
• Using a special brush, the drug is applied: first to the lower jaw, because This is where saliva accumulates faster. Then to the top
• the patient is asked to sit for about 5 minutes with his mouth open in order for a protective film to form.

Can varnish be applied to paint?

As a rule, wood is coated with this substance. However, sometimes there is a need to protect, provide additional gloss, hardness and strength to coatings made from other materials. In most cases, we are talking about water-based or acrylic paint.

The dye on the material must adhere firmly and retain its properties and color. The substance will help increase the strength of the prepared surface and enhance the shine effect. But a special composition should be used. It is recommended to use acrylic products that are odorless, quick-drying, and do not allow the paint to flow.

Do I need to prepare the painted surface for coating? Certain actions will still need to be taken. There should be no traces of dust, grease or other contaminants on the surface. Therefore, the painted base must be primed. You can find out how long it takes for the primer to dry on different surfaces from our article. In addition, the substance and dye must be compatible.

How do you know if the varnish product and paint are compatible? To determine their compatibility, the emulsion is lightly applied to the surface in an inconspicuous place, using a small area for the experiment, just for testing. If no negative changes are found on the surface, then the entire area can be varnished.

IMPORTANT! Do not apply the product to a wet surface. The item must be completely dry.

Is it possible to carry out the procedure at home?

Some people (usually in order to save money) are interested in whether they can do this procedure themselves. Moreover, the product can be easily purchased at the pharmacy. Doctors answer unequivocally - you shouldn’t do this. And many manufacturers state in the instructions that the drug cannot be used at home.

It seems that covering your teeth with fluoride varnish is simple - just “scoop” a little of the composition from the bottle with a brush and carefully apply it to each tooth. However, in reality this is not the case. There are several very important points here.

The first nuance is that before the procedure you need to clean the enamel of contaminants. Because it is simply pointless to apply a protective layer to soft and hard bacterial plaque. You're not going to protect bacteria, are you? Without hygienic cleaning by a dentist, this measure will be ineffective.

The second nuance is that the product is thick, and to achieve a positive effect and for safety reasons, it must be applied in a thin layer and evenly, without touching the gums, tongue and mucous membranes. It is quite difficult to do all this at home: there is always a risk of overdoing the dosage, as well as injuring or burning the mucous membrane.

The third nuance is that people who apply fluoride at home often neglect the fact that its use in large quantities and too often can be dangerous for the body, as well as for the enamel itself. Fluorine tends to accumulate in bone structures and tissues, and due to excess it becomes toxic, which leads to unpleasant consequences. You may experience fluorosis, increased fragility and brittleness of the enamel.

Important! If you bought fluoride dental varnish for home use, you need to know how to use it correctly. Make sure that you have no contraindications and do not suffer from an excess of the element (it can be contained in drinking water and toothpaste). Before applying the composition, isolate the gums with cotton sponges. The best time to perform the procedure is before bedtime.

Which varnish composition is better to choose?

Acrylic varnish, which is fully compatible with the coloring composition, is more expensive than synthetic analogues. It is used if the appearance of the item has special significance, for example, a painting or a piece of furniture made for sale. If staying within your budget is important to you, you should stick with regular wood varnish. Before purchasing, you should study the label to find out the following points:

• Will the coating protect against moisture?
• Will the varnish layer be UV resistant and how quickly will it dry completely?
• The composition is permanent or removable.
• Is the varnish elastic or hard? Stretch film is suitable for flexible substrate (wood or canvas) that changes dimensions; it will not form cracks due to changes in temperature and humidity. Hard varnish is used if acrylic is applied to a hard wooden surface.

After drying, the varnish coating becomes transparent Source vitospb.ru

Benefits of applying fluoride varnish

If the procedure is carried out according to the instructions for use, the protective coating is not destroyed or erased. The product seals the smallest cracks in the enamel, fights pathogenic microorganisms, and ensures a longer service life for fillings. Fluoride varnish enriches the mineral composition of hard tissues, creates a film on their surface that acts as a kind of shield.

The drug protects your teeth from temperature changes, so you will not have any unpleasant sensations from eating cold and hot food. Another advantage that you will get from the procedure is that the composition prevents the leaching of calcium from hard tissues, so the enamel becomes thicker and stronger.

Scope of application

Acrylic varnish is widely used in the production of external and internal finishing works.

It can be used to cover various interior items made of wood, stone, brick, metal, and plastic. This paint and varnish material is easy to use, dries quickly, and protects surfaces from damage.

You need to choose a type of varnish depending on the functional purpose of the surface, thus you will not only significantly increase the service life of the products, but also emphasize the structure of the building material.

For example, it is recommended to apply matte varnish to a brick wall or wallpaper . It will keep the repair in its original form for many years, and the absence of formaldehyde will make it safe even for use in children's rooms or in the kitchen.

To treat wooden floors or parquet, you should choose special varnishes. The material for a solid board forms a more durable and flexible film that will not crack when temperatures and humidity levels fluctuate. The components included in the varnish for parquet boards create a thin film.

But also varnishes intended only for interior work are often not suitable for work outside the premises, since they do not withstand environmental influences so well.

A wide range and a wide range of colors allow you to decorate furniture and interior items - various frames, paintings, railings, steps, figurines.

What disadvantages can you encounter?

If the procedure is performed by a doctor, then there are no disadvantages. At home, at best, you may not achieve the expected effect and be disappointed. However, the consequences can be worse:

• chemical burn of the mucous membrane, which takes a long time and is very difficult to treat,
• harm to the body: we must not forget that the drug, when used incorrectly or excessively, exhibits not so much positive as negative qualities. It can cause fluorosis, lead to brittle bones, anemia, osteosclerosis, Alzheimer's disease, and neurological disorders.

Briefly about the main thing

Acrylic paint varnish is used in cases where they want to further protect the paint layer or give it a more presentable appearance. The best choice for this procedure would be a water-based varnish composition.

When purchasing, you need to pay attention to its qualities: ultraviolet resistance, elasticity, and removability. The varnish layer is applied to the acrylic after it has completely dried; If dilution is needed, use only water.

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Expectation and reality: sometimes they don't match

Some people believe that if they coat their teeth with fluoride, they will get rid of tooth decay forever or even cure it this way. However, it is not.

The product will really help stop the process of tissue destruction if you have initial caries in the white spot stage. That is why it is used to treat it. It will also actively fight cariogenic bacteria, preventing the development of this disease. But if there are too many of them, then the protection can be very short-lived.

It is known that teeth begin to decay when the acid-base balance in the mouth decreases, because... It is in an acidic environment that bacteria are most active and productive. In fact, if you eat a lot of carbohydrates and sweets, the sugars from which bacteria feed, then tooth decay will sooner or later appear again. If you want fluoride varnish to last as long as possible and your teeth to remain strong, then adjust your daily diet.

There are also people with increased fragility and fragility of enamel who, after going through the fluoridation procedure, remain dissatisfied. If the pathology develops against the background of hereditary anomalies, internal diseases of the body, or a sharp change in hormonal levels (for example, during pregnancy), then fluoride varnish alone will not cope with the task. It should be used in combination with other measures: taking vitamins and calcium supplements, reviewing the diet, treating underlying diseases.

Important! Applying fluoride varnish cannot replace dental treatment with a doctor. The product only serves as a preventive measure for dental diseases and increases tissue resistance to bacterial attack, but does not have a pronounced therapeutic effect if the problem already exists.

Acrylic paint: does it need a varnish layer?

The acrylic-based coloring composition has a water-dispersion base. The main binder (polyacrylates, polymers of various compositions) is distributed in water, but does not mix with it and does not enter into a chemical reaction. In addition to acrylates, the composition includes a surface-active additive (plasticizer) and an antiseptic.

The plasticizer is responsible for the formation of a protective surface film. Thanks to this additive, the coating is resistant to wear, mechanical damage and moisture. Acrylic dye is environmentally friendly, dries quickly, and many people find that it creates an impenetrable layer once dry. This is only partly true.

Acrylic is characterized by thermoplasticity. This means that if the coating gets too hot (for example, under the sun's rays), it will reduce its strength, and it is quite easy to damage the softened layer. It has been repeatedly observed that if two acrylic coated surfaces come into contact, there is a possibility of them sticking together.

The varnish layer increases the attractiveness of the furniture Source archidea.com.ua

As the painted acrylic surface dries, water evaporates. The process proceeds quickly, and at the end of it micropores remain. If you apply a layer of varnish on top, it will harden, close the pores and increase the durability of the paint layer.

Varnish is applied to acrylic paint in many cases; for example, artists varnish paintings painted with acrylic. Finishing craftsmen try to varnish wooden surfaces; the same rule is used in furniture production.

Does fluoride varnish whiten teeth?

Will there be a whitening effect? Some patients also ask this question, especially when they see photos on the Internet before and after a procedure performed in a dental office. And here it is important to note that the product itself does not have a whitening effect. However, before applying it, the doctor, as we said above, carries out professional hygiene, during which dirt, pigment and plaque are removed. Therefore, after it, the enamel really becomes cleaner and even lighter by several shades, it acquires its natural color. And the coating applied to it as a result visually makes it even smoother and gives it a healthy shine.

Manufacturers and reviews

Among the most famous whales of the building materials market in the production of acrylic varnish, the following brands stand out: Tikkurila, Neomid, Lakra, Optimist and Goodhim. Let's look at each in more detail.

Tikkurila is the queen of paints and varnishes. The acrylic varnish for parquet – Parketti Assa – received the maximum number of positive reviews. It has increased wear resistance, so it can be used in the most trafficked places. Easy to clean and does not deteriorate when using household chemicals of any composition. Even if there is a need to erase traces of paint from an already varnished floor, you can resort to using White Spirit or any other solvent. Parquet flooring protected with Tikkurila varnish is not afraid of anything.

Neomid is a Russian manufacturer that offers a wide range of paints and varnishes of high quality and durability. Buyers most often recommend acrylic varnish for processing wood products Neomid Sauna. It is used, as the name suggests, to decorate rooms with high temperatures and humidity; it is heat and moisture resistant, easy to apply and durable. Neomid Stone is an acrylic varnish for treating stone or mineral surfaces (brick, concrete and others). After drying, the effect of a wet stone appears; the substance has excellent antiseptic and protective properties. Suitable for outdoor use.

Lakra is a multinational project, concentrated in Russia, but with close ties to Europe and Canada. Thanks to this, all brand products are in demand and have good quality. According to consumer reviews, acrylic varnish is odorless, but has a very valuable factor - low price. Buyers use the line of varnishes of this brand for purposes not related to repairs. Some people are happy to use acrylic varnish for handmade and decoupage projects.

"Optimist" is the most influential and largest manufacturer in Russia. Acrylic varnish of this brand is characterized by high quality coating, good drying speed and environmental friendliness. Customer reviews unanimously state only the positive aspects of this product:

• easy application;
• quick drying;
• possibility of tinting;
• easy to care for varnished surfaces.

The main achievement of the Goodhim is the universal acrylic varnish Goodhim Texture . Its main feature is that it is equally well suited for decorative finishing of premises and interior items. Its versatility allows it to be used for both interior and exterior applications. It has its own color palette, which includes ten shades: walnut, oak, metallic and others. The low price adds special attractiveness to it in the eyes of consumers.

Acrylic varnish is not just another finishing material that will get lost in the interior some time after renovation. It's a whole strategy and one big design decision. It's nice to know that old objects restored with acrylic varnish look refreshed, shiny and pleasantly velvety to the touch. Adding shades of paint to a transparent liquid will allow you to look at things and the interior from a different angle.

How often can you do it

Uncontrolled use and ignorance of how to use the drug will lead to oversaturation of the enamel with fluoride. To prevent this, remember that the optimal number of times a year when a potent product can be applied to your teeth is twice. According to the testimony of a specialist, and only if carried out in a dental office - up to 3-4 times a year.

Experts recommend carrying out the procedure every 3-6 months also because the protective properties of the drug are preserved for about that long.

Techniques for high-quality varnishing

The varnish is applied in two or three steps (with intermediate drying) in any convenient way: with a brush, sponge, spray gun. To ensure a high-quality result, you need to remember the following nuances:

• The surface coated with acrylic paint must dry completely. Depending on the thickness, the process can take from three days to two weeks (full strength gain takes 30 days).
• When choosing a varnish mixture, the quality of the surface is taken into account. Irregularities are more noticeable under the gloss, while the matte layer hides them.
• Pre-priming the surface will reduce varnish consumption. A water-based primer will do.
• Acrylic varnish is diluted only with water (preferably distilled), and water by volume should not exceed 10% of the composition itself.

The primer will help save varnish consumption Source gidpokraske.ru