Initially, bluing a weapon was extremely practical in nature, protecting the metal from corrosion. Today, the coating is also used to return the metal to its original appearance, besides, blackening looks much more spectacular and less noticeable in hunting conditions than metallic luster.
- When bluing is needed
- 2 Features of technology and methods of bluing weapons at home
- 2.1 Cold-burned weapons
- 2.2Hotting blueing weapons
- 3 Processing with an oxidizing agent
- 4 Criteria for choosing the method of bluing
- 5Rules and safety
When bluing is needed
The concept of “bluing” came to us from the distant 1880, when it was often practiced by the best gunsmiths of that time. Then and now it is the best method of finishing high-quality double-barreled shotguns and modern piece rifles.
Professionals and amateur hunters, as well as those who simply monitor their weapons, resort to various methods of bluing weapons. This process is carried out, both with specialists and at home. What we get as a result:
- completely protected from corrosion, because no rust on the blued layer;
- the product looks more presentable;
- during hunting in sunny weather, the black barrel of the gun is not noticeable;
- resistance to abrasion and other mechanical damage.
If you are not lucky enough to become the owner of blued weapons initially, use one of the many methods and deal with this annoying misunderstanding.
Features of technology and methods of bluing a weapon at home
The process of bluing, in fact, is a chemical reaction, so its implementation is carried out in special conditions and in compliance with certain rules. The room in which the manipulations will be performed must be well ventilated or have a powerful hood. To work with acid and other chemical compounds can not use metal containers, only from earthenware, porcelain or glass.
From materials for processing, you can use sandpaper, powdered pumice stone, as well as fine sand. With their help, thorough cleaning and polishing the surface of the weapon. Fluids should be used in the right proportions, as Most formulations are chemically based and can damage weapons.
Regardless of the method of bluing, the following tools and materials should be prepared:
- steel wool;
- rubber gloves;
- protective glasses;
- gun oil (lubricating and cleaning);
- applicators (cotton swabs, rags, brushes, toothpicks).
To perform high-quality bluing at home, as experts say, is impossible. This is especially true of steel oxidation, which requires industrial conditions.
Homemade metal processing methods include cold, hot and oxidation burnishing. Consider the features, as well as the advantages and disadvantages of each of them.
Cold burnishing weapon
This method is widely used among home craftsmen. If the weapon is not exposed during operation to high mechanical loads, they can be blued cold. Cold bluing is carried out in a bath or a special container. It is optimally made of wood or galvanized.
Undergoes bluing without heat treatment using various solutions. There are ready-made mixtures for sale on the metal with a brush. For example, the composition “Crow 3”, “rusty lacquer” or “Paris oxide”. “Rusty lacquer” is a rare mixture, which, if anyone has it, is only due to old stocks. It is not recommended to make a mixture without a certain experience, because occupation is dangerous and time consuming.
Finished compositions are applied to the surface with a brush, after which a protective black film is formed on the weapon. It is necessary to monitor the uniformity of the layer and the ingress of bluing liquid to all hard-to-reach places. After completion of the work, the part is washed and polished.
There is another method – full immersion in the means for bluing a weapon. Immersion in the “rusty lacquer” is the most effective and less expensive way. After carrying out all the procedures, the blued parts are thoroughly washed out using detergents.
The advantages of the brush application method are obvious. The compositions do not need to cook, they are already cooked. Simple application allows even inexperienced beginners to bury their arms, especially since there is no need to follow a special safety technique.
Their minuses highlight the difficulty of promazyvaniya parts with non-standard product configuration. After processing, the surface needs additional polishing. Cold burnishing is not suitable for products subject to constant mechanical stress, since The resulting protective layer is quickly erased.
Hot bluing weapons
Many, especially experienced Voronilshchiki prefer exactly the hot method of processing, considering it the most faithful and reliable. The coating made in this way is durable and lasts much longer.
The general principle of hot bluing is simple: heating-oil-baking. In more detail, it looks like this:
- the product is heated to a high temperature;
- It is placed in oil completely for 10-15 seconds or lubricated with a cotton swab which is abundantly moistened in the composition. The best effect is achieved with linseed, hemp oil. Worse behaves lube and linseed oil;
- after applying excess oil, let it flow in a natural way so that there are no smeared streaks;
- The oiled part is baked using a blowtorch, a gas heater or an old stove. Also suitable for a building dryer.
The baking continues until the surface of the part begins to change its color to black. It is recommended to repeat the procedure for soaking in oil and baking 2-3 times to achieve a quality result.
The advantages of hot bluing more than disadvantages. First, it is a method that has been proven for decades. Secondly, the coating allows you to keep weapons intact for a long time. Thirdly, the absence of chemical impurities eliminates the presence of harmful fumes. The disadvantage of the method is that it requires minimal experience to perform it in order to get a uniform coating without spots.
The oxidation method is often carried out by specialists in laboratories where you can find the necessary reagents: potassium nitrate and sodium hydroxide. The product is pre-prepared. With the help of steel wool surface is treated, which will be crowned. Next comes the coloring process itself:
- for 10-15 minutes the weapon is placed in a cleaning composition to remove lubricants, dirt, oil. Sodium triphosphate, denatured alcohol or kerosene can be used as a cleansing agent for bluing;
- wash the cleaner under running cold water, but hold the product for more than 2 minutes. Kitchen detergent rinse with hot water;
- With the help of steel wire, the weapon and its individual parts are immersed in the prepared solution. Small items can be immersed using a sieve. The solution for hot bluing is heated to a temperature of 135 degrees. The barrel of the weapon sinks under the slope. This way you can avoid the formation of air inside;
- a sieve with fine details should be moved from time to time so that they uniformly stain;
- the exposure time in the solution for bluing is from 15 to 30 minutes. Need to navigate by color. When the product acquires the desired shade, it is removed and washed in cold water;
- the washed parts and the main product are placed in a container with boiling water to remove chemical residues. Keep weapons in boiling water up to 15 minutes. Details with shaped carving up to half an hour;
- Finally, the blued parts are placed in a tank with water-repellent oil. During operation, it will protect products from corrosion and various contaminants.
Plus bluing by oxidation is that the result is quite durable. Knives treated in this way become protected without destroying the hardness of the metal. The disadvantage is that the method is quite expensive and is not suitable for those who do not even possess superficial knowledge of chemistry.
Criteria for choosing the method of bluing
Before proceeding to the procedure of the crowing itself, you need to decide which method will be most effective in your particular case. This is done by several criteria.
- The degree of deterioration of the previous bluing. If most of the coating is preserved, it can be renewed with alkaline bluing or in a cold way. If more than half of the coating is erased, it is recommended to completely remove the old layer and re-perform the treatment procedure.
- Age of weapons. Old-fashioned samples were processed by thermal bluing. Unfortunately, today this method is not claimed because of the duration of the process. You can repeat it at home with the help of special preparations available on the market, or you can ask the wizard for help. There are some rules here. Antique weapons with silver soldering can not be processed thermally, because salts can dissolve silver.
- The rationality of one or another method of crowning in terms of costs. To bury a cheap barrel with an expensive thermal method is at least unwise.
- The cost of the methods of bluing. Here are guided by common sense and foresight. If now the expensive method of coating seems unnecessary, then in the future such savings could result in an expensive restoration. Also cheap methods of bluing will protect the weapon for a short period of time, and the procedure will need to be repeated again and again. And if you calculate the cost of regular events and one, but for a long period, then the second option will not seem so expensive.
In any case, the choice of method depends on the capabilities and preferences of the owner of the weapon.
Any manipulations with weapons need to adhere to safety regulations, especially with regard to manipulations at home. Failure to observe the rules of conduct is dangerous for health and life not only for you, but also for those around you.
- Before burning down the firearm, be sure to defuse it and dismantle the wooden elements.
- Solutions with chemical components can emit harmful vapors, so the whole process should take place in a well-ventilated area.
- Highlight special dishes and tools for bluing, keep them separate from household equipment and wash well after use.
- Working with chemicals involves complete protection in order to avoid burns.
Whichever method of bluing is chosen, it requires preliminary preparation:
- cleaning the surface of the workpiece;
- fine surface grinding;
- degreasing, after which work should continue only in rubber gloves;
- use only those tools that are suitable for bluing weapons at home;
- final processing of the product.
Starting bluing, it is necessary to strictly follow the order and sequence of actions to prevent damage to weapons.