Nitre bluing salts

Nitre bluing salts. The melting point is slightly higher, with liquidus at aprox. 00. I am going to go with Brownell's NitreBlue but am wondering what sorts and sizes of containers and burners/temp. Like. Nitre bluing is more closely related to heat treating or heat bluing. Fumes from the oil and charred Dec 4, 2023 · Spring covers and extractors were heat treated polished and tempered using Nitre bluing salts to bring the parts to peacock blue . Colt used bones to a heavy degree, that were completely dried. Oven bluing is basically the same, but with the surrounding air you don't get as good a color. Add cold water to the Bluing Tank and Dulite`s Steel Kote at the rate of 7lbs per gallon of water. $90. not your usual tempering spectrum obviously ranging from almost purple at the end, through Jun 6, 2023 · I often blue screw heads by this method - polish the head with #220 wet-dry paper, degrease with acetone, and then apply Birchwood Casey paste blue with a que tip. Turn parts and small pieces a deep, rich, lustrous blue with a finish that's tougher and prettier than most of the cold blues. There are also hot bluing solutions that require use of a blowtorch or other heating device to process the bluing. As an added bonus, the salts can be used for the drawing operation when heat-treating springs and parts. 33 oz) of manganese dioxide per pound of total nitrate). Browse stories related to nitre bluing on the Turnbull Restoration blog. May 27, 2004 · 3. (they are NOT dissolved in water, they're used straight). The mixture is heated to 310 to 321 °C (590 to 610 °F) and the parts are May 15, 2020 · Nitre bluing is a process for producing a colored patina on metal parts. Colors range from a yellowish golden color to blue and finally to a beautiful blue black finish depending on how long the pistol is left in the salts. A hot blue salt bath is about 285F to 292F - the lower temps are for higher altitudes. One drop of water and you are wearing 650* molten liquid. The salts play a factor in the coloration too, but it is mostly a heat reaction. Place crystals in a strong container that will stand frequent heating to high temperatures. Proven in small shops for over 50 years and used by top firearms manufacturers. DuraBlue Nitre Aerosol Kit Contains: One DuraBlue Nitre Aerosol Can. #6 · Feb 7, 2017. The "cold" bluing process is more common among gun owners who can easily return their barrel's blue finish without the need Jun 2, 2015 · I used the nitre bluing salts and a Lee casting pot to do the firing bluing of the small parts on these guns. I have used melted potassium nitrate to blue steel. Some of the methods of include “Hot Caustic Salt”, ” Slow Rust”, “Express Rust” and Nitre bluing. Nitre bluing is a common way of bluing small steel parts such as screws and pins. Avoid contact with eyes and skin. I use a Lee Pro casting furnace. [ 1] Item. I also have to wonder what happens if a fuel were introduced to the melt. Slide Only. The colors usually range from a straw yellow, to dark purples or robins egg blues. Aug 12, 2011 · For this and other MidwayUSA videos visit the MidwayUSA Video Library: https://www. Most folks know it for the peacock blues found on Colt's, Winchesters A short video showing the process of using nitre bluing salts to color small steel gun parts. The Bluing Procedure is Simplicity itself . Frame and Slide. They just provide a liquid that can be brought up to temperatures of 900 degrese before breaking down. At least, that’s the theory. Heat bluing is also tempering, and 700-800F is too hot for most parts. 7 Our Oxynate No. Jul 21, 2010 · Yes, the Brownell's product you want is called "Nitre Blue". Oct 7, 2007 · The NitreBlue salts will melt. 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. 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 Oct 15, 2015 · 65. This produces a blue much like what we see on Colt screws. Jun 21, 2017 · I nitre blue small screws, triggers and so forth in a small stainless steel container that you can buy in the pet food area at Walmart or a pet store. Due to the high temperature used in Nitre Bluing parts that are subject to high pressure such as the barrel, bolt and receiver 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. The same NitreBlue Bluing Salts can be used to draw the temper on steel parts that have been hard-ened, such as knife blades and tools. (245 cubic cm). In this GunTec presentation Larry Potterfield, Founder and C Mar 26, 2012 · Nitre bluing the small parts is best done by stripping them from the action and bluing separately - actually most bluing/blacking is best done by stripping to component parts. Location: Mount Sterling Kentucky. Set the rinse tank off to the side away from the heat but close enough to work easily from. Supplied in crystal form, which is heated to make a liquid. “Nitre Bluing” is a highly decorative process in which parts are dipped in a solution heated to 600 degrees. Medium size salt particles -aka- "Kosher Salt" or "Rock Pretzel Salt" Great for pretzel topping & meat etc. 99. ” The caustic salt mixture must be warmed in a metal basket to a temperature from 275 to 310 degrees F, relying on the composition of the traditional caustic black. However, for a better blue on knife hardware, set up a niter bluing po It is nitrate salts that melt around 450F. Typically referred to as fire, heat, or temper bluing, this provides a unique blue color. let sit, and wipe off. Here's some pics of my first attempt at Nitre bluing. NO Additives - NO Iodine - NO Anticaking - NO Microplastics. The process is simple, and what you are getting is essentially a temper color. Heat up crystals which will melt and form a liquid. $84. Description. Instructions are here. Aside from the salts (082-090-019WB), a casting thermometer or heat treating thermometer (084-069-225WB ) can be used to monitor the salt's temp. 1 lb. One recommended chemical method is to brush or sponge over the previously polished surface of the steel with a solution consisting of 2 parts of crystallised chloride of iron, 2 parts solid chloride of antimony, and Feb 1, 2012 · The Colt "Royal Blue" ultra polish finish was first used on the Colt Python in 1955, and for many years the Royal Blue finish was known inside the Colt factory as "the Python finish". The most controlled method I found was to buy a lead melting pot, hi-temp thermometer, and nitre bluing salts. Card with a super fine wire wheel (like you can put your finger in it when running at 1750 rpm), repeat 4-6 times, done. There is also Parkerizing which gives the best protection of traditional metal finishes and is often recommended under many spray on finishes. Oct 22, 2015. Lower temperatures give a "straw Nov 21, 2003 · Then it came to me, low temp salts would be cheaper than buying a second oven, and be useful not only for tempering but also for marquenching, martempering, and heat coloring. All for just a few dollars more than those "bare bones" kits. Feb 5, 2015 · The first one is a warm bluing (boiling) method that uses lye (caustic soda) and either sodium, potassium or ammonium nitrate (fertilizer) in a 2:1 ratio. Plan ahead and allow 20-30 minutes to boil. Join Date: June 27, 2018. cominstagram: @357. Nitre bluing Niter and colour case. depending on the steel and how dense a film you want. May 27, 2004. (2) 40 lb. Seriously, be freakin' careful. 3. That's interesting but sodium hydroxide is what is used in hot blue. Depending on the temperature of the salt bath. 250g Bluing Salts. Also known as Fire Blue, Nitre Bluing was historically seen on small parts of handguns and long guns. highveldt said: Real Nitre Bluing (liquid Potassium Nitrate bath at 800 -900+ degrees F 20-30 minutes) tolerates use much better than the so called "niter bluing" salts (not real) sold by Brownells and used by a large number of gun finishers--because it is easy, not the best way. Bake salts in oven at 200°F for 15 minutes, stirring every 5 minutes. 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. Provides a deep, blue-black color on most gun steels (except stainless). The classic color is "peacock blue. This liquid keeps the temperature of the hands even so that filigree hands blue evenly. 171 posts · Joined 2011. 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. Feb 22, 2016 · Express blueing, slow rust blueing, hot salt blueing, nitre blueing, carbona blueing – all are better than cold blueing. [5] Aug 17, 2011 · Flame bluing is a process that dates back to early British gun-making and is still in use today. ] Takes 15 to 45 min. It is for caustic gun bluing (hot black oxide), and is not at all the same thing. Do all the prep you would for express or rust blueing, especially degreasing. That blue you're looking for should occur about 600-650 degrees. See PDF for full instructions. After degreasing, it moves to a hot rinse tank which generally is distilled water. This coloring is done by heating the metal up until it tempers to the right hue. Oct 3, 2016 · Heat bluing works fine. And consists of the following basic steps: 1 - Clean the properly polished gun and parts in Dicro-Clean 909™. DICRO-CLEAN 909 ™ - Use in a heated soak tank to remove the dirt and grime from gun steel that can ruin a bluing job. It occurs in nature as a mineral, niter (or nitre in the UK). Brownells Nitreblue~ Bluing Salts. It is not identical to "Mar-Quench B" from HeatBath, but it is very very near the same. The other is nitre bluing which actually can impart a range of hues to metal from straw to black. May 10, 2020 · The function of the charcoal is pretty much the same as the liquid nitre salts, to provide a way of controlling the temperature and making it uniform around the firearm. To achieve 58/60 Rc the tempering temperatures of 1085/95 are in the 570 -600 Deg F Nitre salts are designed to completely change the temperature of a small part, in order to heat treat it, and leave behind the residual coloring associated with heat treating at that temperature. Consult physician immediately. It can be achieved in several ways. It also scares the c&^p out of me. Bath operates at 285 to 295 degree F. Feb 18, 2019 · Nitre bluing is limited to small, non critical parts, heat bluing or tempering of springs. Mar 9, 2021 · Mount a semi-sacrificial block on the table, and face it off level, then clean it with isopropyl, and apply blue tape. May 15, 2016 · Niter (Nitre) bluing is nothing more than temper bluing in a controlled and air free environment. Put the parts in for a few seconds to a minute and they come out beautiful blue. http://www. For many years it was often difficult to have a gun blued and have it match the exact shade it may have been before and nearly impossible to bring a firearm to a gunsmith and have the blue match what may have been Sep 26, 2014 · Niter Bluing is mostly a heating technique to achieve different color to the steel. Sep 1, 2013 · Essentially, the nitre bluing salts acts as a substrate for the metal parts to be controlled in a more precise temperature to achieve the desired "charring" of the metal, which gives it that nitre blue look. Set up your stand and place the Bluing Tank, next to the Soap Tank. Danger: Oxidizer - Contains Sodium Nitrite, Sodium Nitrate and Potassium Nitrate. SDI. Oct 9, 2014 · The bluing of metal is an oxidation process. when you get the color you want, quench it. In this way, you can get small parts straw, white, gold, purple, and most commonly royal blue by nitre bluing at a specific temperature. 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. $6. Middle of the road blue is pretty cool. OXYNATE NO. In this case, you take a mixture of potassium nitrate salt and sodium hydroxide salt and melt them (700 °F (371 °C). Member. 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. Once the stuff comes to the right temp, dip the parts in until the desired color is attained. For skin: Wash with soap and water. This particular early 1892 I restored by hand polishing to 600 grit followed by 0000 wool and semi chrome polish which mimics the leather backed wheel sheen but doesn't do any harm to hand polishing. 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. It makes a bright royal blue on mild steel. Oct 31, 2013 · Today we are going to teach you how to Nitre blue without Nitre salts. Get The Sought-After Look of Nitre Bluing. Two of the different colors you can get. Jun 10, 2014 · Brownells sells the Nitre bluing salts and you can use a lead casting pot to heat them to the melting point. 2 LB (1 KG) Box. " But nitre bluing is capable of producing yell Nov 29, 2012 · Just boil in distilled or rain water after rusting for a few hours (Summer humidity), and it turns nicely blue/black. Feb 10, 2024 · Nitre bluing Niter and colour case. In today's Triple-T (tools, tips and talk) #82, I'll be demonstrating how to do both hot bluing and hot blackening with hot salts! (links below)NitreBlue: Jan 13, 2012 · Precision32. 4 grams (0. Dec 13, 2018 · How to Blue a Gun: Cold Bluing. (1) 24 lb. Material name: NitreBlue (TM) Bluing Salts, 10 lbs. Sponsored. You can use a Coleman propane gas burner to heat and melt the salts which will began melting at about 600 degrees F. I found that a consistent 650 degrees worked best. Brownells sells chemicals specifically for bluing stainless, I doubt yours will. There is no chemical reaction. 390F Do not get Oxynate salt. The part will achieve a nice bluing when dipped into the solution for. here's the results of blue and beyond for the three steels - the candy cane effect comes out much better. 7 hot salts bluing is the type most commonly used by firearms manufacturers and offered Jun 15, 2022 · One of these is Nitre bluing. Cold blueing is OK for touchups, at best. Feb 27, 2022 · After initial preparations, hot salt bluing usually is a five or six-step process. [I use a steel deep fry thermometer. EVERYTHING! All the basics - Tanks, Stands, Burners, Cleaners, Salts and Oil that the "other guys" sell - PLUS everything else you need to start bluing guns. Most Like-Sized Receivers. Mix all ingredients together well. SOLD - $245. Not transferrable to Feb 22, 2014 · Do this and if the salts get hotter than around 330 degrees the high temperature will destroy the salts. of salts will take up approximately 15 cubic in. plus a separate HazMat surcharge (God know what that costs). 600F is more around blue, and an appropriate temper for lots of parts. These pots were put in another coal fired furnace and heated until the desired color was reached. HoroSolv. 250 gms Jar. Supplied in a jar. View 360° Image. 7 has, for more than 55 years, been the popular bluing salts for the professional gun trade. #1. Cold blueing solutions usually just don’t wear well. box supplied. Apply a couple of times. Or fastest delivery Fri, Mar 15. 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. - 650° F. Remove from oven and allow to cool to room temperature. The only thing Nitre bluing salts do is enable you to hold a steady temperature and to be able to heat the whole piece uniformly. Clean the back of your stock, in this case, the panel, and apply blue tape. SPECS: 10 lb. Dip the parts in, watch for the color change. Apr 20, 2021. All you need is a stove. Hightemptools sells the salts an well as places like Brownell's. Turn parts and small pieces a deep, rich, lustrous blue with a finish that’s tougher and prettier than most of the cold blues. The salts (potassium nitrate) are heated to about 700 degrees F and the parts submerged in it. May 9, 2023 · Try niter bluing. Hot Caustic Salt Blue. Translucent white color. Dec 01, 2021 · Herbal bath salts recipe directions. NITREBLUE~ BLUING SALTS (No Reviews) SKU: Model: UPC: 050806107342. Bluing is primarily cosmetic with some forms of bluing (or parkerizing) providing a level of man doing the bluing, and an asset no other bluing supplier can claim, or provide, for their hot bluing salts. I can always order those salts, I suppose, but seems like so many others have had success with just potassium nitrate. You need to get into the 700 to 750F range for that bright Spring Temper Blue color. Hot Bluing is also known as Caustic or Hot Salt bluing, and can be very dangerous. 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 Brownells provides four basic types of bluing; Oxy-nate™ No. 2 - Rinse and scrub in cold, clean water. Personally the hot caustic bluing is my preference as a deep blue / black on well polished steel is my fave. Nitre Bluing creates an array of colors from deep blues and purples to a pale yellow. You can get a lot of different colors from niter bluing, not just blue. Oxynate No. Gorgeous "Fire Blue" Colors & No-Scale Tempering – A Master Metal Finisher’s Secret Useable In Any Shop. Store in a glass, airtight container. 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. In practise it’s a little trickier to use and most people find the results uneven; the chemical seems to bond to different Jul 31, 2010 · Some salts mix with water. Getting moisture of of everything was noted as critical. 11-28-2012, 11:15 AM #6. It is an ionic salt of potassium ions K + and nitrate ions NO 3−, and is therefore an alkali metal nitrate. Remove the parts and proceed as directed with the parts. controls all of you find most useful for your low temp salts. Bulldogger. It was used as a tempering process to draw back parts that had been case hardened, and it was used as a final finish on parts that would not see pressure. #3. I nitre blue with straight potassium nitrate from Lowes and it melts around 400 or so (I forgot) and starts off with a straw color, but as you get up to 700 the parts turn a deep navy blue. You can improve your results by doing two things: 1. Jan 7, 2009 · Just the bluing salts alone will set a person back about fifty bucks, not to mention the specialty tanks to use the solutions! However, niter-bluing uses nothing except potassium nitrate for its active ingredient, and potassium nitrate in a suitably pure form is as far away as the local hardware store, nursery supply shop or home improvement mart! Apr 9, 2022 · No, have only done this type of heat bluing with nitre salts. 95. Whether we are working for you, the end user, or a major manufacturer, we strive for 100% satisfaction. Frame Only. Nitre bluing will not hurt the barrel. --- The NitreBlue salts cost 10lbs=$40 and 20lbs=$62. Double gun shotguns - Side by Side shotguns, and over under shotguns - Including drillings, double barreled rifles, SxS double rifles, combination guns. Royal Blue didn't refer so much to the color as to the brilliant polish, the finest polish ever done on a semi-production pistol. NitreBlue Bluing is a controlled heating process that will color virtually all carbon and tool steels. Free in-store pickup at Blue Ash, OH. We use melted salts to get to the right temperatures. 477 posts · Joined 2010. Does nitre bluing alter the Rc of the blade and makeke for a blade that is not sufficiently hard to make a good working tool. $749($0. Lower temperatures give a "straw" color like the older Luger parts. Heat up the crystals, which will melt Sep 6, 2009 · Nitre bluing salts can be purchased from Brownells. It uses boiling lye solutions. One 6oz Trustrip Cleaner/Degreaser. Feb 3, 2020 · Combat Weapon System. #2 · Jan 14, 2012. It looks like you are utilizing a different salting method, as the Brownells salts become molten at 275F (135C) - but pure potassium nitrate seems not to become molten until 334C. The "hot" process uses nitre bluing salts and requires liquid heated to 650 degrees to activate the salts. Niter bluing is the hottest form of bluing. . Put ingredients on a large, flat pan. Work that blue into the screw slot with a tooth pick. or Best Offer. Tyler Gun Works produces some of the best custom finish work in the United States. • NEVER add any chemical or additives to NitreBlue Bluing Salts or molten NitreBlue Bluing Bath. 250g. Make sure the one you buy will reach the bottom of your pot. 7 hot salts bluing is the type most commonly used by firearms manufacturers and offered Apr 20, 2021 · 2,054. May 13, 2016 · 05-14-2016, 11:40 AM. Surface finish is everything in heat bluing. The process is really quite simple: Heat the salts up to 570° F. When melted it's basically a thick liquid that will not boil and will go to a very high temperature. 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. Rinse. SaveShare. pails supplied. For eyes: Flush with water for 15 minutes. Posts: 44. Nitre blue salts consist of sodium nitrate, sodium nitrite and potassium nitrate. It is a process that is often used to temper springs or heat treat small parts without Single Shot Receiver. I just polished the parts to a mirror finish with Flitz on a Dremel polishing wheel, degreased with breakclean and submerged the parts in the solution for about 5 minutes. edu 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. Additional information. (4. EDL Discussion starter. May 28, 2016 · May 28, 2016. It is a soft, white, highly soluble mineral found primarily in arid climates or cave deposits. com/video-library Feb 5, 2017 · 13911 posts · Joined 2013. #7. Seems to me that the bulk of the steel that goes into mosaic damascus blades is 1085/95 and 15N20 also known as L6. #6. Chemicals and cast iron tank. Used for bluing steel clock hands. Mar 3, 2017. 23 shipping. One of these is Nitre bluing. Sodium Nitrate was the commonly used 'salt' for the process. The brilliant blue finish can be used on any type of metal using the convenienct aerosol can. Heat up to the desired temperature and dip the polished and de-greased parts in it. Birchwood Casey Perma Blue Liquid Blue Gun Bluing Kit. Apr 7, 2016 · As for tempering gun steel: Hot salts aren't hot enough to temper gun metal. Solvents, tank covers, personal safety gear, extra additives and lots more. Color Case 1911. Use super glue ( cyanoacrylate) between the layers of tape to stick the part to the table. Jun 22, 2014 · Nitre Bluing is not the same as Hot Salts Bluing (although heat and salts are used). Some of it depends on what the steel alloy is, so some experimentation is also needed. Bluing Salts. One that I wanted to get a handle on is nitre bluing. There are two principal methods of obtaining a blue finish on steel parts, namely, (1) the chemical, and (2) the heating methods. Salts heating up. These parts are generally polished to a mirror like sheen to greatly enhance the beauty. Place polished pistol into the heated Nitre bluing salts. The salts do not cause the color change. Fire fighting equipment/instructions 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. ago. Mar 2, 2017 · Laredo, Texas. For quantity work (one to a dozen guns a week or month) the cost per gun is extremely low. Plus, we include our step-by-step Bluing Apr 2, 2023 · DIY Rust Bluing Recipe:4 TBSP Peroxide1TBSP White Vinegar3/4 TSP Non-iodized SaltBoil in Distilled Wateremail: 357mdad@gmail. Niter or nitre is the mineral form of potassium nitrate, KNO 3. The bluing solution applied in hot bluing is a caustic salt mixture of potassium nitrate and sodium hydroxide recognized as “traditional caustic black. Color Case Stainless POR. $ 66. E. Winchester used to add a small amount of Manganese Dioxide to it. OXYNATE™ NO. Clean your tanks with Dulite #31 cleaner. midwayusa. The bluing process has changed a lot over the years both in the preferred methods and the chemicals used. 25 sold. Nitre Blue. Apr 18, 2015 · Nitre Bluing Jump to Latest Follow 762 views 5 replies 5 participants last post by reconciler Apr 19, 2015 Potassium nitrate is a chemical compound with a sharp, salty, bitter taste and the chemical formula K N O. Colt used the same mixture of ground charcoal and charred animal bone in the bluing furnace except the small parts were put in cast iron pots for the bluing process. Brownells provides four basic types of bluing; Oxy-nate™ No. You need a professional set up and very powerful ventilation, as well as several very large tanks and a controllable heat source. You could achieve this by just waving a piece above a propane torch, but that isn't very precise and is done by eyeballing. That would pretty much destroy the myth that nitre bluing and flame bluing can't be used for entire firearms because it would weaken them. 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. Nitre Bluing (photos) These are some recent 1911 parts I Nitre Blued at the shop. 6kg) in plastic, resealable plastic pail. Fire bluing adds the finishing touches The Process. (247) $22. jb0356 • 7 yr. The salts will blue in a temperature window- stay in the 253-280 degree area, using ladled cold water to drop the temp back down, don’t add water to parts in the boil. 21/Ounce) FREE delivery Sat, Mar 16 on $35 of items shipped by Amazon. Some do not. The salt can be controlled to within 5 degrees witch is near impossible to do with open flame. I use lead or a small pan of brass chips and a propane torch. Oxpho Blue Professional Grade Cold Gun Blue CREME. 1440 Version #: 01 Issue date: 11-07-2017 SDS US. Historically, the term niter was not well differentiated from natron, both of which have been very vaguely defined but generally refer to compounds of sodium or potassium joined with carbonate or nitrate ions. It Works Great! Apr 28, 2023 · 353. Description: Nitre Bluing set for pistols. Jun 13, 2011 · Nitre blue is just a method of bluing using heat. Initial investment around $120 and you can do all kinds of small parts or basically anything that will fit in the pot. I also use a propane deep fryer kit. and some more experimenting with longer soaks this afternoon, in the 10-30 minute range, still with the salts around 615F. Keep water well away from it. As with other 19th Century technology, it is fairly easy to do for the advanced tinkerer. 2. Most double shotguns represented here. Immerse item whilst lifting out occasionally to allow oxidation to take place. magdadMusic: May 3, 2009 · It's called a "bluing salt" but it is not like the cold blues you have been using. If you don't have a thermometer, heat until a sample part will just sizzle cold water. If you were charcoal or nitre blueing, then you might be losing some of the quench in the steel (these blueing methods are done at about 600F), but not with hot salt blueing. vf yg wg kn oh bo nk gm mj ug