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DIY Cold Blackening Fluid

An improved formula both for experts and non-professionals. With KLEVER-"Schnellbrünierung", you can give steel (not exceeding a chromium content of 3%) and iron a flawless browning. Whether to refinish a worn blackening on handguns or long firearms, to brown entire weapons or armours, or to blacken small parts in trade and industry: KLEVER cold blackening fluid spares you tedious burnishing bathes and saves time and money. The 50 ml bottle weighs approx. 72 g.

More information

in stock: 14 pcsItem physically stored in our Warehouse in Kadan, Delivery date 12-Dec at your place

16,00 €
13,22 € excl. VAT

Variants in stock

Content: 50 ml in stock 13 pcs
Content: 1000 ml in stock 1 pcs

Product No: 9971

Period: Modern times / Miscellaneous

Ballistol DIY Cold Blackening Fluid, 50/1000 ml bottle

Important note: This burnishing can only be used on steel up to 3.5% chrome!

How many square inches covers the 50ml Cold Blackening Fluid?

The area to be treated depends mainly on how thick the layer of the Blackening Fluid you apply. In general, a 50ml bottle is sufficient for a bascinet type helmet.


The surface to be blackened should be carefully degreased (e.g. with Robla cold degreaser). Then apply KLEVER cold browning with a brush. Let it work for about 3 to 30 Minutes, until a yellowish-white film has formed. Now rinse it thoroughly with water (using a brush), dab the surface dry with a soft cloth or a paper towel and spray with BALLISTOL or GUNEX for protection.


  1. Noxious
  2. Environmentally hazardous

Practical experience

Our suits-of-armor are blackened with this Blackening Fluid. The master armorer says it is the best agent he has worked with throughout his career. The surface has to be degreased perfectly and for the best result it is recommended to apply the Blackening Fluid twice. The result is a purely black color. When blackening larger surfaces, he could observe slightly bluish tinge once. When applied on glossy surfaces, the gleam is retained. This Blackening creates an impermeable layer, which perfectly protects the metal against corrosion. Practical experiences are very positive in our workshop and we can recommend this German product with pleasure.

General information on Blackening

The blackening is also described as bronzing. It is a process of coloring of steel products, so that they get an attractive black color which also provides in part the protection against corrosion (especially of hunting firearms). A thin black or blue-black-color oxide is developed during the blackening.

For a perfect oxide coating, it is important that the surface is well processed. The finer processed the surface is, the brighter and better the resultant effect is. The items to be blackened should have clean surface without rust and scales. The blackening oxide copies the inequality of the surface such as scratches, cracks, local roughness, etc. If you want a glossy coating, polish the metal parts mechanically before blackening. In order to achieve a matte finish, roughen the metal surface first.

Included in these categories: Sword maintenance kit

Reviews (1)

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  • 1
    Václav Šima

    No super věc a jednoduché

Comments (3)

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  • 3
    Daniel Probošt

    Dobrý den, prosím Vás, lze použít i na hliník? Děkuji za odpověď.

  • 2
    Tomáš Pokorný

    Řekl bych, že platí pouze pravidlo obsahu chromu a ne tvar či struktura kovu = toto rychločernidlo lze použít jen na oceli s obsahem do 3,5% chromu. Tomáš

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