HOME / sitemapFAQsBOOKSHelp WantedsAdvertiseContact   you are here: Hotline/Forum => Letter 668
most fun in metal finishing

Blackening process named BLACK-T


Q. Does anyone know a blackening process named BLACK-T? It is a mixture of polymers, Teflon and graphite and has very good corrosion resistance. Sara

Sara Michaeli
    chemical process supplier



A. I am not familiar with "Black T". However, by your description it sounds like a brand name for a permanent dry film lubricant. Typically these products are a blend of fluoropolymers (i.e., Teflon®), molybdenum disulfide, graphite, and/or pigments in a polymer resin binder system. At Luke Engineering, we apply Everlube brand products from E/M Corp. and Xylan brand from Whitford Corp. Other manufacturers have similar products

Chris Jurey, Past-President IHAA
Luke Engineering & Mfg. Co. Inc.

Wadsworth, Ohio


A. Black-T is a process of applying Teflon polymer as a coating on firearms. It is known in the custom gunsmith circles as having been developed by William Birdsong. Other than that, I don't know much about it.

Harold Mayo


Q. Hi,

I am a materials engineer for an electro-optical company, we have been using black oxide MIL-DTL-13924 [link is to free spec at Defense Logistics Agency /] , and BLACK T (VICKERS SPEC VS-1-3-1-165) on stainless steel bolts for some time now. The BLACK T has always proven superior in both corrosion and wear resistance, but we now have a customer who will not accept processes that are not MIL or other int'l spec (ASTM/SAE etc). Is anyone familiar with a MIL Spec equivalent to the Black T, or any other black coating with higher resistance than black oxide?


Baruch Bdeleted
Materials R&D Engineer - Modi'in, ISRAEL

December 31, 2012

A. Hi Baruch. Salt Bath Nitriding, or QPQ (quench-polish-quench) salt bath nitriding, is a process available from many vendors which offers hardness, wear resistance, black color, and good corrosion resistance. With respect to firearms, Glocks use the Tennifer brand name for this process.


pic of Ted Mooney Teds signature
Ted Mooney, P.E. RET
Pine Beach, New Jersey


RFQ: What is a Black-T Coating per VC-1-3-1-165 Class 2, Type 1
I'm interested to contact companies who are capable to proceed with this coating.

Frederick Shterenberg
- Garland, Texas


A. W.E. Birdsong & Assoc. Inc. Black-T (tm) and Green-T (tm) are NATO Black and NATO Green respectively. Some claimed basic Stats: ASTM G87 [link is to spec at TechStreet] Kesternich Cabinet (Acid): greater than 60 cycles; ASTM B117 [link is to spec at TechStreet] (Salt): greater than 4000 hours; Surface COF: 0.08; Thickness 18 to 22 microns.

Steve Weinert

A. Black-T is a coating by a company called CRT (Corrosion Resistant Technologies).

Mark Musselman
- Troy, Michigan

Ed. note: CRT is an applicator of the W.E. Birdsong coating.

January 7, 2009

Q. Does anyone have information on the optical properties of this coating (such as reflectivity/emissivity)?

Ron Fourier
- Yokneam, Israel

November 30, 2009

Q. Is there any detail spec to be found on internet? Or there any replacement for such coating?

Jason Chen
Kodak - shanghai, PRC

December 1, 2009

A. Hi, Ron; hi, Jason.

As far as we see, Black-T is a trademark for a proprietary technology and I think a "replacement" for a secret proprietary would therefore be an oxymoron. But if you tell us what properties you are looking for, I'm confident that there are other coatings which offer the properties that you seek.

Why does the question come up? Is it spec'ed on a drawing or a P.O.? Thanks!


pic of Ted Mooney Teds signature
Ted Mooney, P.E. RET
Pine Beach, New Jersey

June 23, 2010

Q. Does anyone know where I can get a copy of the specification for Black T finish (VICKERS SPEC VS-1-3-1-165)?

Mark Sheridan
Mechanical Engineer - Ramat Gan, Israel

December 31, 2012

A. We have in our company few years of experience with Black-T coating, using it to coat steel parts for mechanical and hydraulic applications.
It is a very good coating for steel hydraulic manifolds, and due to its small thickness and teflon additive it is also very good for shafts coating.

- Tel Aviv, Israel

Ed. note: Thank you very much for your willingness to share your positive experience, Yoah. But we really don't like to post testimonials on this technical site. For one thing, people are leery of posting negatives for fear of hearing from a company's lawyers -- so testimonials are always overly favorable and unbalanced. Secondly, there is no practical way to know the vested interests of the posters, so testimonials encourage phony "plants". Finally, a favorable review of our supporting advertisers' products will naturally be viewed with suspicion, while a favorable review of a non-advertiser will not ... how fair is that?  :-)

December 3, 2013

Q. I would also like to know if anybody knows where I can get a copy of the specification for Black T finish (VICKERS SPEC VS-1-3-1-165)?


Tom Anderson
- Leeds, Yorkshire, United Kingdom
  ^- Privately contact this inquirer -^

December 3, 2013

A. Hi Tom. Vickers is now a part of Eaton Hydraulics, so if the spec is still in effect you should be able to get a copy from your Eaton buyer. If the work is not being done directly or indirectly for Eaton, I'm having a hard time understanding why people are trying to process to that spec. If you are looking to perform or have performed the Black-T process, I think Birdsong can provide the info you need. Good luck.


pic of Ted Mooney Teds signature
Ted Mooney, P.E. RET
Pine Beach, New Jersey

ADD a Q or A to THIS thread START a NEW THREADView This Week's HOT TOPICS



JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & DevicesUsed & Surplus

©1995-2014     -    Privacy    -    Search