Turn parts and small pieces a deep, rich, lustrous blue with a finish thats tougher and prettier than most of the cold blues. Bluing liquid, also called laundry bluing or just bluing is a substance used in the rinse cycle to make white clothes appear whiter. Brownells is your source for bluing salts,metal bluing at brownells parts and accessories. Quick bluing solution black magic 50 ml diy black finishing. For use in a front load washer, use the same amounts of bluing as directed above. The temper is affected if the salts are heated above 500f. A gunsmith here was telling me he hoped he could find the chemicals for his own bluing salts which lasted longer than the commercial mixes. The differences in different brands of blackening salts is in the color it provides in the metal coloring process, which is trace amount of mainly. Stewarts bluing is a brand of liquid bluing agent used for whitening fabrics.
While you might have heard of gun bluing, or even owned blued firearms, what you may not know is how to do it yourself. Bluing the traditional, hot salts way top rated supplier. It is actual rust that gets converted, so the metal needs to be fully covered in red nastyness. The key to any bluing job is the polishing done prior to it being blued or if you prefer a matte finish, it is bead blasted prior to bluing. Cold blues are also available you could buy from wholesale sports or the like. Bead blasting, removing pits and desired finish all play a factor. However, since bluing salts react with the carbon in the steel, hot tank bluing cannot be used on most types of stainless steel. The authors took a special colt tour, where colt actually built them a colt official police so they could see exactly how it was done.
Any of various coloring agents used to counteract the yellowing of laundered fabrics. Get essential office supplies fast with free 23 day shipping, plus daily deals, coupons and gifts with purchase. As the water from the solution evaporates with the help of ammonia, the salt crystals begin to form around the particles left by the bluing. For over 75 years, shooting sports enthusiasts have turned to. Also, for commercial bluing chemicals, the normal temperature range is about 290 degrees. If ww2 then likely they were salts blued and yes that would have a blueish tint. As mentioned earlier, the book firearm bluing and browning. Homemade hot blue formula original post courtesy of blair emory my comments in brackets km all bluing is really blacking. Dont expect results that look like a well done hot blue finish from a boiling salts process, but oxphoblue is great. It gets its name from the blue black color this process imparts on the metal. The book is a famous standard reference for colt collectors. I want to know the exact composition of the bluing salt used for the bluing of m. A chemical structure for the reaction product between the fast blue bb salt fbbbs and the. Magnetite is black and that is what rust blueing produces.
Homemade blueing salts i am just wondering if anyone has a recipe orand tips on a good homemade blueing salt bath. The book has been reprinted a number of times, but was written in the 40s. Lower temperatures give a straw color like the older luger parts. Niter nitre bluing salts are a potassium nitrate salt mix that melts around 400f. The actual composition of any of the black oxide chemicals whether it be in powder form or liquid form consist of three main ingredients. Cold bluing is generally a selenium dioxide based compound that colors steel black, or more often a very dark gray. The standard around here for hot salts bluing is about 250350. I will assume that most reading this do not wish to spend a lot of money on supplies and equipment, but want an inexpensive way to produce a black oxide finish for small parts.
Traditional rust bluing is a slow process, employing various techniques to rust the surface of the metal. True gun bluing is an electrochemical conversion coating resulting from an oxidizing chemical reaction with iron on the surface selectively forming magnetite fe 3 o 4, the black oxide of iron. For some reason sodium nitrate is coming to mind but a quick glance at some stump removers in the store d. Simple exposure to the elements works well, but humidity tents. Immerse the wired hand into the liquid, lifting it out from time to time to allow oxidation to take place. Order roaring spring grade school composition books today. Heat up crystals which will melt and form a liquid.
Black oxide formula for hot blueing of gunsfirearms. Like many at this site, i prefer to use or make my own supplies rather than buying them. Any old gunsmithing book will have a dozen different formulas for bluing compounds, but they are all based on nitrates to oxidize the surface of the steel and sodium hydroxide to raise the boiling point to where the action is fast and even enough to be. Growing crystals is a fun and educational project that kids enjoy. Cold bluing is generally a selenium dioxide based compound that colours steel black. Color influenced by polish and composition of solution. You always want to have the bath at a boil and you control the temperature by adding water to lower and letting water boil out to raise. It works real well on fittings and such that are not hardened, and thus temper is not an issue.
Buy products such as five star composition book, college ruled, 100 sheets, color choice will vary 09343 at walmart and save. Top rated supplier of firearm reloading equipment, supplies, and tools colt. As an added bonus, the salts can be used for the drawing operation when heattreating springs and. What is recommended for neutralizing the hot blue salts sodium hydroxide ammonium nitrate on steel to prevent further rusting after it has been blued in a hot tank. Preferably, practice using a gun that isnt worth a lot. The blue shine is due to additional chemicals such as manganese that are added to the mix. A discussion started in 2001 but continuing through 2020. I have disassembled, beadblasted, cold blued, reassembled, and disassembled again.
It uses grants stump remover and drano kitchen crystals as the two ingredients for one version, the other uses ammonium fertilizer and drano. Since its creation bluing liquid has found other uses including personal care and science projects. Dulite corp a leading supplier of black oxide equipment. I was digging through a lever gun or bullet casting website and read a pretty interesting article in using stump remover as a bluing agent but cannot remember the chemical in question. Sodium hydroxide, sodium nitrate and sodium nitrite.
Brownells search top rated supplier of firearm reloading. There are several different techniques, and each one has its own particular uses. It gets its name from the blueblack color this process imparts on the metal. Bluing, laundry blue, dolly blue or washing blue is a household product used to improve the appearance of textiles, especially white fabrics. Not big chunky rust, more of a thin film of oxidized metal. If it has soldered joints then hot salts wont work bc the temps involved and the salts will attack the solder, breaking the joint. Dulite is the world leading supplier of black oxide bluing chemicals, manganese phosphate parkerizing solution, kwikseal firearm lubricant and rust preventative oil.
Our local library had their copy of dunlaps book stolen just recently. I plan on buying one of those old star 9mm paras from sarco for my experiment, so i actually plan on trying different formulas and using muriatic acid to remove the blueing solution results until i find one that works on that. Use eye protection at all times of course you can purchase premixed salts or you can do as myself, make your own. Hot salts bluing is a simple process for coloring metal, but you must pay attention to detail if you wish to obtain satisfactory results. Stewarts bluing was started in the late 1870s in litchfield, minnesota by albert emerson stewart, a traveling salesman for a chicago grocery. Which bluing salts do you recommend those sold by brownells or dulite. It is primarily a colloid of the blue pigment prussian blue and water. I plan on buying one of those old star 9mm paras from sarco for my experiment, so i actually plan on trying different formulas and using muriatic acid to remove the blueing solution results until i find one that. Also the chemical composition of chemical degreaser alkaline.
Bluing definition of bluing by the free dictionary. I need dunlaps recipe for hot bluing and blacking, it is a good one and is simple. An effective method for imparting blued finish to clock hands, screw heads etc. Nov, 2016 most experienced gun owners know the importance of gun bluing.
If you like to shoot, work on guns as a business or hobby, or just own a gun, this is the place for you. Diy gun bluing stepbystep walkthrough tactical guru. Heat bluing is ok where changing the temper of the part is not critical, but frankly, i dont like to do it on any part that will be subjected to any stress. I have the necessary equipment to perform the hot blue process.
The prussian blue doesnt dissolve so bluing is actually a colloidal suspension where the prussian blue remains suspended in the water. Please note that the bluing salts themselves do not blue the steel, but merely keep it at an even temperature, so that all thicknesses of steel, blue at the same time. The hot process is an alkali salt solution using potassium nitrite or sodium nitrate. A crystallized compound bluing salts used to facilitate the bluing of steel. Bluing the traditional, hot salts way my trusty remington 870 has been through a lot here at brownells since i purchased it. Bluing liquid is basically two ingredients mixed together though more ingredients may be added depending on. Bluing is a process by which steel is protected from rusting by passivation. No one sells more chemicals, equipment or firearm rust preventative oils to the firearm manufacturers and dealers than dulite. Jun 03, 2012 how to blue a steel barrel using super blue. Bluing is a passivation process in which steel is partially protected against rust, and is named.
The blade is immersed into the molten salt and the surface colors to a blue. Hot chemical bluing compound meets mil spec c924bam1. I will assume that most reading this do not wish to spend a lot of money on supplies and equipment, but want an inexpensive way to produce a black oxide finish for. If the dispensing drawers on your washer remain unlocked during the cycle, dilute the bluing in one to two quarts of water and add through the dispenser directly into the cycle after it has already filled with water. Coming as i do, from a gun smithing background, i recommend you draw the temper where you want it, polish the part and use a heated bluing salts method to obtain the color you desire. See more ideas about composition notebook, composition, notebook.
Hot bluing almost always gives a jet black finish, but metal composition may have some slight effect. Food coloring adds to the beauty of the forming crystals that appear to grow out of the porous material of the. I made up some solution from memory and ill be darned if i can get it to work. Used during laundering, it adds a trace of blue dye often synthetic ultramarine, sometimes prussian blue to the fabric. Most bluing is a corrosive process using salts at high temperature. As an added bonus, the salts can be used for the drawing operation when heat treating springs and parts. It is a difficult product to apply evenly, offers minimal protection and is generally best used for small fast repair jobs and touchups. I have an old engineering book dictionary of metals and alloys 1939, which. Hot salts bluing black oxide hot salts bluing is a simple process for coloring metal, but you must pay attention to detail if you wish to obtain satisfactory results. Bluing steel is the process of oxidizing the surface of the metal to protect it from rust. Light reflection off polished surfaces can give a blue hue. Bluing liquid is basically two ingredients mixed together though more ingredients may be added depending on the recipe.