Marking Brass--The "Brass Black" experiment

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mongoose33

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I've been looking for a way to mark my .223 brass that I've run through the RCBS X-Die, so as to tell it apart from brass that hasn't been prepped for it. The X-Die allows you to repeatedly resize brass without trimming and chamfering each time.

After a lot of great suggestions on THR, I decided to get some "Brass Black" and see if I could effectively mark my brass.

The instructions indicated that one should clean the brass to be marked w/ alcohol, then remove tarnish/whatever with steel wool to allow the Brass Black to work. I used a Scotch Bright pad (and wheel, which I have on a grinder), and it cleaned up the brass nicely. I just felt it would be better than taking steel wool to it.

I tried Brass Black before buffing w/ scotch bright but it has almost no effect. I"m sure this is due to the polish deposited on the brass from tumbling, so the cleaning w/ the Scotch Bright pad (or steel wool) is necessary.

Anyway, I decided to mark a band near the base of the cartridge, using a Q-Tip to distribute the Brass Black as I rotated the case in my fingers:

vbottle.jpg


It's nice enough to work with, and as you can see, it really creates a clearly visible band around the brass:

vfinished.jpg


I tossed them in the tumbler with a little polish for about 20 minutes, hoping to put a thin coat of polish on them so they'd resist wearing off.

I thought about also blacking the headstamp, but the marking is so clearly visible in the styrofoam ammo tray I decided it wasn't worth it:

vholder.jpg


So far, so good. It really stood out when I put it on, and it did what I wanted following firing, when it was mixed in with other brass that I hadn't marked:

vafterfiring.jpg


Perfectly easy to pick out the X-Die cases from the others.

However, once I tumbled the cases, much of the black wore off. Enough that I suspect that after one or two more tumbles, it won't be as useful:

vaftertumble.jpg


In the pic above, I show two non-fired, non-tumbled cases on the left for comparison. Clearly the marking on the fired cases is much less distinct generally.

I will do some experimenting to see if I can either buff the case a bit more prior to blacking (though it was completely black the first time), or perhaps give it a bit better polish job to preserve the black.

In the end, I'm not certain this is the answer. If it's going to wear off, it's no better than simply marking the cases with a sharpie or permanent marker. But I sure do like how it looks!
 
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Tumbled some brass I had marked with the "dykem" layout fluid. After 2 hours it was almost completely gone. Except the piece I marked in the extractor groove. Still darkened there.

That brass black makes some nice looking marks. Does multiple applications make it any darker?

Justin
 
Tumbled some brass I had marked with the "dykem" layout fluid. After 2 hours it was almost completely gone. Except the piece I marked in the extractor groove. Still darkened there.

I'm glad to hear that--it'll save me trying it. I went w/ Brass Black because I could easily get it from Grafs.

That brass black makes some nice looking marks. Does multiple applications make it any darker?

No, it's very black after the first application.

Maybe if you just marked the head stamp it would soak into the lettering, make them black. It would be a lot harder for the media to get into the lettering during tumbling. I think it would be more permanent, but not as obvious to see from a distance.

I did a couple on the headstamp; didn't tumble them to see what the result would be. The stripe was so pronounced that I didn't pursue it. I suspect, too, that firing influences how much it wears off, both heat and case expansion. I don't know how much it would stick in the letters, as there's no way to get a scotch-bright pad, or steel wool, in there.
 
It takes me roughly 2 seconds to run a Sharpie line down the headstamps of loaded cartridges in a plastic box. No messing around.

You could even use different colors for different loads. Lasts a long time and it couldn't be easier.
 
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