Nitre bluing salts formula substitute for guns. Oxynate No. Nitre bluing is simply a form of heat color change. You need to melt the salts and slowly bring them and the barrel up to 600 degrees and hold until you get the color you want. Air Gun Accessories; Air Gun Handguns; Air Gun Magazines; Air Gun Rifles; CO2 Cartridges; Pellets; Airguns; BB Shots; AK47/74 Parts. Jan 11, 2006 · The bluing salts aren't hot enough to hurt the temper on gun parts. Boil gun parts at 280-315 degrees. Nitre bluing is more closely related to heat treating or heat bluing. Brownells provides four basic types of bluing; Oxy-nate™ No. Should I be concerned. Mar 6, 2022 · Nitre Bluing sometimes referred to as strawing or hot bluing, is more akin to heat treating (like color case hardening) than bluing. 7 is manufactured by one of the country’s chief producers of manufacturer’s chemicals and sold by us to the gun trade by exclusive Niter bluing should be used only on screw, pins, and other non critical parts. Place crystals in a strong container that will stand frequent heating to high temperatures. Doug Ponzio said: These are some tests with 52100, 5160, O-2, O-1, L-6, W-2 SA202-E and Nickel using NitreBlue bluing salts from about 540 degrees to 565 degrees. Jul 20, 2010 · 1 part Sodium Nitrate (Chile Nitre or Chile Saltpeter), 2 parts Caustic Soda (Sodium Hydroxide) and two parts water by volume. All times are UTC - 8 hours Dec 8, 2004 · From "Engineering Workshop Practice" by A W Judge. Fire bluing or Nitre bluing is a traditional finish that gunsmiths and major firearms manufactures, used during the later part of the nineteenth century, and is an visually pleasing side effect of the heat treating process. In these cases, we bead blast the guns before bluing. With twenty guns to blue, we were working with about 1,000 parts. One that I wanted to get a handle on is nitre bluing. #3 · Jan 14, 2012. You have to add distilled water, which is how the temperature is regulated. Cold blueing solutions usually just don’t wear well. EDL Discussion starter. At least, that’s the theory. 7 has, for more than 55 years, been the popular bluing salts for the professional gun trade. depending on the steel and how dense a film you want. I had a Thermometer in the Bluing Pot, and when it got up to temp. With proper care and handling, this process need not ever be repeated, making this a valuable investment to a weapons owner. The Lye must be pure 100% like "Red Devil" or the kind used for soapmaking. Step #2 Use the Bluing Solution. Jan 18, 2018 · The plum color on Winchesters with nickel steel is caused by using the wrong (correct for regular barrels) temperature. Sort by: A timelapse of nitre bluing salts melting down. Then boil the parts for 2-3 minutes again, and so on until after the 3 rd time you apply the bluing formula. DICRO-CLEAN 909™ - Use in a heated soak tank to remove the dirt and grime from gun steel that Parkerizing. BLUE FINISH ON STEEL. 3g of iron filings. Rinse parts, boil in pure water for 15min and then soak in WD oil. Watch out for splashes of hot salts as they tend to spew out of the pot/tank when parts are being submerged and captive air escapes. Mix and boil in a steel or enameled container. This step is crucial to achieve the desired color and finish. It's easily done with small parts by melting the salts in a lead casting pot, a barreled action would mean a container of molten salts large enough to submerge the entire action into a pot of 550 degree solution. Parkerizing has been May 11, 2016 · Brownell's has a neutralizing process that's more intensive than the bluing its self! If any of you guys remember an outfit called Numrich Arms, they had to dissolve the company on paper and open it by a new name The Gun Parts store because they polluted about 7 homes water wells with dead bluing salts that were located near the store. The nitre bluing process (sometimes referred to as fire bluing, peacock bluing or niter bluing) is a gun metal finishing process involving a salt bath solution of sodium and potassium nitrates, heated to exact temperatures. 4 grams (0. Nitre salts are used because they can be heated to the necessary temps without boiling off. Jan 28, 2016 · Also known as fire blue, nitre bluing was historically seen on the small parts of hand guns and long guns. Make sure the one you buy will reach the bottom of your pot. Rust bluing is a nicer, more satiny finish, also more durable. In this GunTec presentation Larry Potterfield, Founder and C With “Express Rust Bluing” the firearm (again after complete preparation is complete) is heated and the Express Blue is carefully wiped onto the steel. It occurs in nature as a mineral, niter (or nitre in the UK). It WILL eat skin and eyes instantly. One of the best of these old time processes is to make a solution of three quarter ounce of spirits of nitrate; an equal amount of tincture Aug 14, 2007 · Today that same blued finish is more of a matte black. Feb 18, 2019 · 1,439. Cold Bluing is a relatively straightforward process: you buy the bluing compound (typically selenium dioxide) paint it on, rinse it off, and you’re done. Nitre bluing produces a peacock or electric blue color and is a nice contrast against a high polished black bluing job This is what I am talking about Supplied in crystal form, which is heated to make a liquid. I transferred the Gun from a Pot of Boiling water into the Bluing Salt solution. This is after bluing in the nitre salts. For quantity work (one to a dozen guns a week or month) the cost per gun is extremely low. Cold blueing is OK for touchups, at best. Again, nitre bluing is rather delicate. JoeLee. Mark Lee Express Blue #1, Express Brown #2, and Slow Rust #3 are true rust bluing solutions. Distilled water. Nitre blue is a form of "temper" blueing, where the temperature of the metal to be blued is controlled by a molten sodium/ potassium nitrate [nitre] bath. For best results, use on bare metal or basecoat with DuraCoat #MC2-Stainless Steel. Otherwise, they couldn't be blued. Use the solution in a single pass to cover small surfaces, or in parts no larger than 4 to 5 inches when covering large areas, then smooth it out using sandpaper. This was the factory finish for most old guns and is considered to be the standard. 7, hot salts bluing; Dicropan IM™, a hot wa-ter blue; Nitre Blue™ Bluing, a heat blue; Dicropan T4™, Oxpho-Blue™ and 44/40® cold blues. I boil for 12-15 minutes in distilled water (stainless steel tank). You see the transition from Pink powder to a yellow foamy liquid. All the bluing processes produce and oxide coating on the steel. OXYNATE™ NO. com Nitre bluing salts Makers - Darne, Merkel, Arrieta, Beretta, Browning, Holland, Purdey, Richards, Bernardelli, Parker, Fox, LC Smith, and most other double barreled shotgun, gun and double rifle makers. ﾠ If you order the course "Sand Blasted" finish (like military Mar 2, 2021 · Typically, we will give each gun a 400 grit polish before bluing. It is an ionic salt of potassium ions K + and nitrate ions NO 3 −, and is therefore an alkali metal nitrate. At Lohman Gunsmith we do a hand polish of 320 / satin, 400 / semi gloss or matchless / high OXYNATE No. Using the volume measure, pour 29ml of hydrochloric acid and 35ml of nitric acid into the jar. Provides a deep, blue-black color on most gun steels (except stainless). Niter bluing involves melting KNO3, then putting the clean metal in it. We are able to blue your gun back to the original type of bluing finish it had on it. 171 posts · Joined 2011. 6. It is then boiled and carded. Browse stories related to nitre bluing on the Turnbull Restoration blog. Aug 9, 2020 · Boil the parts for 2-3 minutes. publicly reply to Daniel Hernandez's post ⇧. This brilliant blue finish can be used on any type of metal using an airbrush, spray gun or convenient aerosol can. (they are NOT dissolved in water, they're used straight). When they started up production after WWII these parts were caustic blued. Then apply the bluing formula. Larry Potterfield has an interesting video on this where he uses a Lee melting pot to create the 650 degree temps required. And finish the stock work. Brownells Metal Bluing products have an average rating of 4. I'm sure that a search for "potassium nitrate bluing" or "saltpeter bluing Mar 20, 2010 · Thank you for visiting our supporters. I also did the rear sling swivel at the same time. Oct 8, 2019. OXYNATE NO. com & USAknifemaker. The pistol needs to have the hardness check before you fire it. Dark room or backdrop it looks black. ﾠ If you order our high gloss blue,ﾠ the surface is so smooth that it will wear through during field use faster than our normal bluing. Bluing does NOT add metal to your gun like chrome plating does. E. After about 20 or 30 minutes the Bluing looked good. com Turn parts and small pieces a deep, rich, lustrous blue with a finish that's tougher and prettier than most of the cold blues. Although not very durable the look of pre 1938 firearms are Some of the methods of include “Hot Caustic Salt”, ” Slow Rust”, “Express Rust” and Nitre bluing. Proper bluing of stainless steel requires careful preparation, heating, and cooling of the metal, as well as the use of Those of you that have followed my posts on this forum or on my blog are aware that I have been experimenting with different types of bluing. Use rubber gloves [on eBay or Amazon], protective clothing and goggles [on eBay or Amazon] ! I believe the electric blue colored parts was nitre blued. Using the scale, measure out 13. 3/5 and 349 reviews from verified buyers and brands like BROWNELLS, BIRCHWOOD CASEY, SHOOTER'S CHOICE, & PRAXAIR. 2 - Rinse and scrub in cold, clean water. The parts are suspending in a salt solution that contains Potassium Nitrate, Sodium Nitrate and other chemicals (Brownell's recipe also contains Sodium Nitrite, other recipes include Manganese Dioxide) that is heated to 600 degrees. Yes, it uses molten salts in its processes but the finish change is more of a by-product when it is used for heat treatment. ﾠ The durability of bluing depends on the roughness of metal surface. Some customers, however, request a matte blue finish. Heat up the crystals, which will melt and form a liquid. Feb 10, 2010 · Bluing itself is simply suspending prepped part into solution while it's temperature maintained around 260-280F. Peroxide, iodized salt, a few drops of distilled water. One 6oz Trustrip Cleaner/Degreaser. See full list on kurtthegunsmith. In the nitre bluing process, polished and cleaned steel parts are immersed in a bath of molten salts—typically potassium nitrate and sodium nitrate (sometimes with 9. Cold Bluing. Jul 2, 2017 · In case the nitre bluing salts you were inquiring about were for regular hot salts or hot tank bluing, here is a recipe for homemade bluing salts. This can all be fixed with a matte blue for $100. Do all the prep you would for express or rust blueing, especially degreasing. These are done in house in batches and while we strive to keep the colors of each batch as close as possible there will be some variation from batch to batch. It is due to the chemicals used and the finish on the gun before it is exposed to these chemicals. 250 gms Jar. Sort by: Potassium nitrate is a chemical compound with a sharp, salty, bitter taste and the chemical formula K N O 3. Brownells sells the salt, and you can probably use a bullet casting furnace for heating. I do the first rust for an hour, then recoat, rust for another hour. (2) 40 lb. Can I use a blowtorch to heat the bluing solution? Dec 3, 2014 · Thank me later 😉. How long should I leave the firearm in the bluing solution? The firearm should be submerged in the bluing solution for around 10 to 15 minutes, depending on the desired finish. Black oxide formula: 600 gm sodium hydroxide, 25 gm sodium nitrite, boiling solution, immersion 10-30 min, rinse well; it must be oiled, waxed or lacquered. Feb 1, 2012 · FIREARMS BLUING AND BROWNING - Brownells Here's a couple of formulas. Keep water well away from it. As far as cleaning goes, I have used automatic dishwasher detergent, which is mostly calcium carbonate, to degrease. I also use it to clean out my SS May 7, 2012 · Good point with he stainless basket, If you have a SS tank the most that you would be out is one charge of bluing salts, and the tank could always be used for cleaning. You'll need nitre salt and a heating source capable of melting it (about 600 F to my knowledge). American Bluing & Guns, LLC was established as Vermont’s only specialty bluing, parkerizing and restoration gunsmith shop. Each has its own advantages and disadvantages; knowing which method to use and apply will improve the outcome and result in a fine-looking, blued metal finish. After reading a few customer reviews on this product specifically, most loved the end result but compare it to more of an epoxy coating rather than a chemical reaction produced with the Jan 10, 2021 · Bluing or black oxidizing is a process of treating steel to create a thin protective shell around it. -----The bluing i was referring to (not what the OP did) is an oxidation reaction with the steel that will not affect the heat treatment. when you get the color you want, quench it. For skin: Wash with soap and water. #2 · Jan 14, 2012. Mar 25, 2024 · It is currently Mon Mar 25, 2024 3:23 pm: Board index » Gun Talk » Gunsmithing. It is worth noting that 1 lb of salts occupies approximately 15 cubic inches, providing users with ample quantities to complete multiple bluing projects. man doing the bluing, and an asset no other bluing supplier can claim, or provide, for their hot bluing salts. 20-25 minutes in generally sufficient to obtain nice reach black color. The mixture is heated to 310 to 321 °C (590 to 610 °F) and the parts are • NEVER add any chemical or additives to NitreBlue Bluing Salts or molten NitreBlue Bluing Bath. It can be performed on gun barrels and other firearm components. The Roy Dunlap formula: Jan 11, 2006 · The bluing salts aren't hot enough to hurt the temper on gun parts. The procedure was popular with early gunsmiths Get The Sought-After Look of Nitre Bluing. On ferrous metals, bluing appears as a dark-colored, protective oxide layer on the surface. This took about 45min to get up to tempera Dec 13, 2013 · 12-14-2013, 09:14 AM. Aug 17, 2011 · Flame bluing is a process that dates back to early British gun-making and is still in use today. Proven in small shops for over 50 years and used by top firearms manufacturers. It works by turning rust, into black iron oxide. The temperature the solution is heated to is much lower than that of the Caustic Salt Bluing process and it is an acid process where hot salt bluing is caustic. There are two principal methods of obtaining a blue finish on steel parts, namely, (1) the chemical, and (2) the heating methods. May 7, 2012 · Good point with he stainless basket, If you have a SS tank the most that you would be out is one charge of bluing salts, and the tank could always be used for cleaning. Gently spread the solution to the part to be blued as evenly as possible, applying a clean applicator. Surface finish is everything in heat bluing. Dec 13, 2018 · How to Blue a Gun: Cold Bluing. For eyes: Flush with water for 15 minutes. This is the most dangerous part of the process, slowly add a small amount of Feb 18, 2024 · The bluing solution should be heated to around 275 to 310 degrees Fahrenheit for optimal results. You may have ruined the gun. ] Takes 15 to 45 min. com - home Forums General Discussion DIY Gunsmithing @ doublegunshop. Keeping Track. Barrels are drawn back at around 1100°F to bring their Rockwell hardness into the 30 range, while parts that are hardened to limit wear from impact will be more in the range of RC50-55, which means they will be drawn down at around 700-800°F. 7™ - The finest, most reliable Bluing Salts available. There are various methods of bluing stainless steel, including hot caustic, rust, fume, cold, and nitre bluing. • NEVER add any chemical or additives to NitreBlue Bluing Salts or molten NitreBlue Bluing Bath. Custom Satin Finish – We polish the metal to a 400-grit finish, bead blast with aluminum oxide media and then wire-wheel after blasting and prior to bluing. You can see some of the process in the pictures below. Hot Bluing. Check out all of our Paint & Metal Prep products at Brownells today. Nitre Blue is a hot salt process that leaves the pins and screws a brilliant blue color that compliments your 1911 finish. The Brownell's "Gunsmith Kinks" books have a lot of very useful information on all types and methods of bluing. I'm concerned about the temperatures involved 600-650 degrees affecting the heat treating of the parts. A charcoal blue is similar to a color case where the parts are heated in powdered charcoal. Both of these processes are repeated until proper color and coverage had reached it’s desire level. Caustic hot bluing (a mix of salts Sep 27, 2023 · Immersion: Carefully immerse the cleaned and prepared gun parts into the hot bluing solution. . Outside in clear skys it will be blue . Browse 46 Metal Bluing Products Up To 24% Off. keep adding solution and heating until you have a thick coat on the piece. A pink foam will rise to the surface of the new NitreBlue Bluing Bath as the Salts melt. Directions. com Nitre bluing salts The spray on bluing I found was on amazon and is made by Duracoat. Also known as Fire Blue, Nitre Bluing was historically seen on small parts of handguns and long guns. Keep them submerged for the recommended duration, typically a few minutes. This is a great custom look for your custom rifle. Doug! Aug 13, 2007 · When used to blue a large area, it tends to give a streaked, cloudy gray-blue color. Bath operates at 285 to 295 degree F. degrease a half a pad of steel wool and dissolve it into the solution. Skim the foam from the surface and discard. Aug 20, 2019 · After opening all of the Windows, I got A Pot of Boiling water going, and in an old Cast Iron Pot I mixed up the Salts. Deluxe Finish – We polish the metal to a 600-1200 Jul 29, 2009 · I have now tried 3 commercially available rust bluing solutions--Pilkingtons, Brownells and Laurel Mountain Forge--for standard rust bluing. Again, hot salts gun bluing is DANGEROUS. In practise it’s a little trickier to use and most people find the results uneven; the chemical seems to bond to different Bluing does NOT add metal to your gun like chrome plating does. May 21, 2013 · In chapter 38: Forgotten Firearm Formulae, there is a formula for blueing of firearm, it runs; The principle of 'browning' a firearm is simply the even rusting of a barrel with the use of certain chemicals. Nitre Blue. Makers - Darne, Merkel, Arrieta, Beretta, Browning, Holland, Purdey, Richards, Bernardelli, Parker, Fox, LC Smith, and most other double barreled shotgun, gun and double rifle makers. I also use it to clean out my SS Air Guns, Ammo & Accessories. Jun 20, 2010 · The colors are due to a layer of oxides created as the steel is heated. There is also Parkerizing which gives the best protection of traditional metal finishes and is often recommended under many spray on finishes. The colors usually range from a straw yellow, to dark purples or robins egg blues. [I use a steel deep fry thermometer. The brilliant blue finish can be used on any type of metal using the convenienct aerosol can. Mar 5, 2024 · The product comes in a 10 lbs plastic bucket, ensuring convenient storage and easy access to the salts. Jan 10, 2021 · Bluing or black oxidizing is a process of treating steel to create a thin protective shell around it. Oct 9, 2014 · Here are the other screws that were repaired. pails supplied. Feb 5, 2015 · Most folks know it for the peacock blues found on Colt's, Winchesters, and other firearms. Probably the earliest surface treatment for metals was browning. The resealable plastic pail helps keep the salts fresh and uncontaminated. Do not mix in an Aluminum pan. You can improve your results by doing two things: 1. #5. Now all that's left is to rust blue the barrel, action, and load gate and side cover. Nitre bluing will not hurt the barrel. Danger: Oxidizer - Contains Sodium Nitrite, Sodium Nitrate and Potassium Nitrate. Another good non-glare finish with a softer sheen than the standard matte finish. The colors vary based on the thickness of the oxide layer. It is a process that is often used to temper springs or heat treat small parts without Aug 7, 2019 · What are gun bluing salts? The nitre bluing process (sometimes referred to as fire bluing, peacock bluing or niter bluing) is a gun metal finishing process involving a salt bath solution of sodium and potassium nitrates, heated to exact temperatures. Staff member. Dip the parts in, watch for the color change. AK47/74 Triggers; AK47/74 Handguards; AK47/74 Stocks & Accessories; AK47/74 Muzzle Devices; Other AK47/74 Parts; AK47/74 Pistol Braces & Accessories; AK47/74 Grips; Black Powder Guns Below are the steps to mix the ingredients to fill a 500ml bottle: Pour 420ml of distilled water into the amber bottle. This liquid keeps the temperature of the hands even so that filigree hands blue evenly. Try it on scrap metal first, because the result of nitre bluing can vary due to temperature and Dec 3, 2014 · Thank me later 😉. Aug 29, 2015 · Nitre bluing is the use of nitre salts heated passed the melting point and submerging the parts into the molten salts. Feb 27, 2022 · After initial preparations, hot salt bluing usually is a five or six-step process. First, your workpiece is placed into a hot degreasing tank to ensure that any particulates or oils that you may have missed are washed away. There are five methods of gun bluing that gunsmiths use today. Avoid contact with eyes and skin. Most of the spray on options I was looking at were very different then the bluing solution in the bottle that you would use on bare metal. com Owner. Quenching: After the immersion, quickly quench the parts in a cold water tank to stop the bluing process. Nitre bluing salts are made of a mixture of potassium and sodium nitrate and can be purchased pre-mixed from MidwayUSA or Brownell's. Jun 13, 2011 · Potassium nitrate is used in niter bluing. Meant to post this first. I know you can get it from Brownell's, but you have to buy atleast 10# for $60, plus pay $20 for hazmat fees plus whatever their shipping would be. Rust Bluing. 33 oz) of manganese dioxide per pound of total nitrate). 7 Our Oxynate No. I polish to 320 at least, sometimes to 400, never beyond that. DuraBlue Nitre Aerosol Kit Contains: One DuraBlue Nitre Aerosol Can. It is very effective hot. Filters. Those who do their own bluing, do so secondary to other services. Nitre bluing is limited to small, non critical parts, heat bluing or tempering of springs. I also use a propane deep fryer kit. Lower temperatures give a "straw Nov 29, 2012 · The Recipe we used was ; 5 pounds 100% sodium Hydroxide (100% Lye) 4 pounds Ammonium Nitrate (Sodium Nitrate may be used instead) 1 gal. Feb 22, 2016 · Express blueing, slow rust blueing, hot salt blueing, nitre blueing, carbona blueing – all are better than cold blueing. Then boil the parts for 10 minutes, take them out and let them cool off. You can make a container out of PVC and simply pour the boiling water into it. -watchin- May 13, 2012 · I have been sucessfully hot bluing guns for quite some time, however I have no experience with Nitre bluing where the parts are immersed directly into the melted salts. 5. They’ll be nice and rusty at this point. The pin set includes one each of Clean and degrease parts with boiling 5% NaOH solution, etch with 5% citric acid + soap for 5-10min, rinse and soak in bluing solution for 30-60min or until desired depth of color is attained. From my research, it appears that Nitre salt is just potassium nitrate, which I would think you should be able to get locally. com Nitre bluing salts 2007. When water contacts the chemicals you can get violent explosions that can splatter the chemicals. Nitre Bluing is not the same as Hot Salts Bluing (although heat and salts are used). A. And consists of the following basic steps: 1 - Clean the properly polished gun and parts in Dicro-Clean 909™. 7 hot salts bluing is the type most commonly used by firearms manufacturers and offered Brown rust is Fe2O3 that becomes black rust Fe3O4 when boiled in water. We even can do slow rust bluing just like the gun makers did 100 years ago is almost a lost art and provides the best rust and corrosion resistance for you firearm. This results in a very bright 'fire' blue, or a purpleish blue. It is a source of nitrogen, and nitrogen was We are happy to offer our custom Nitre Blue pin set and grip screw sets for sale. The main difference between the two blacking solutions is that rust is immediately formed with the Express Blue #1 but it takes hours for the rust to form with the Slow Rust #3 formula. Bluing is primarily cosmetic with some forms of bluing (or parkerizing) providing a level of Mar 13, 2018 · Browning and bluing are terms used to describe any of several chemical treatments of metals that are essentially controlled rusting processes. One recommended chemical method is to brush or sponge over the previously polished surface of the steel with a solution consisting of 2 parts Bluing is a process used to add a blue tint to stainless steel, providing both aesthetic and functional benefits. Finally got a good day to set up and finish bluing the Krag parts. It is not necessary to build a heated tank. I use lead or a small pan of brass chips and a propane torch. If you don't have a thermometer, heat until a sample part will just sizzle cold water. May 28, 2016 · KnifeDogs. Where other gunsmiths may offer bluing services, most send their hot bluing work out of state. Register Log In doublegunshop. Be real careful that all parts are DRY -- and if it is hot and you are sweating, make sure a drop of sweat does not fall into the melted potassium nitrate. This is another heat blue method, only using a salts compound that melts when heated. 5 pounds 100% sodium Hydroxide (100% Lye) Nitre bluing Niter and colour case. This is a very caustic mix that is used in a steel tank only. Dec 4, 2023 · Charcoal bluing takes on whatever the light surroundings are . 477 posts · Joined 2010. All of the heat blues are affected this way whether done in open hearth charcoal method or the gas retort furnace with charcoal /oil mixtures. The blue-black image of black iron oxide is what gives the name to this process. For the Colt SAA, the blue parts on very early guns (1 year of production) were Nitre Blued, Colt then started Charcoal Bluing these parts up until the teens or 20's, then they switched to Carbonia blue for a while. There is also the old process called rust bluing that produces a blue/black finish (different than heated salt bluing). In practise it’s a little trickier to use and most people find the results uneven; the chemical seems to bond to different Jan 13, 2012 · Precision32. After degreasing, it moves to a hot rinse tank which generally is distilled water. The Bluing Procedure is Simplicity itself . When the metal is submerged in the liquid hot salts, it changes color like heat bluing, from a light straw to a brilliant blue. “Parkerizing” or Phosphating is different process in which either zinc or manganese phosphate is used to add a protective coating on metal parts. - 650° F. The process is really quite simple: Heat the salts up to 570° F. Consult physician immediately. Fire bluing adds the finishing touches Add more Nitre Blue Bluing Salts, one dipper full at a time, waiting for each dipper full to melt down before adding anoth-er until the desired Bluing Bath depth is reached in your tank. Apply solution and use a heat gun to heat part up and dry the solution into a layer of rust. ye ao ab qx tw gj ab pp ij wq