AR15.Com Archives
 Halp! Lemi-Shine and Green brass? (pic)
jacobsk  [Team Member]
5/2/2013 8:52:32 PM
So I have my wet tumbler set up and have tumbled a few thousand pieces of brass so far.

I've been running about a gallon of dirty range brass at a time in 2 gallons of water with about 2/3 of a 45ACP case worth of Lemi-Shine on top of a 2-3 second squirt of Dawn dish soap.

The first cleaning before depriming all of the brass came out great.

I tumbled a few thousand casings and then began depriming / resizing.the batch. After running them through the press I threw them back in the tumbler (with the same recipe) to clean the lube off and clean out the primer pockets. Now the casings are coming out varying shades of green

I read through the wet tumbling thread and it seems like this may be a result of too much lemi-shine? or possibly tumbling them in an appropriate concentration of lemi-shine for too long?

I suppose I don't mind them being green, as they're clean, but it would be nice to know what I'm doing wrong.

The bucket to the left is from the initial tumbling and has lube from depriming. The top right bucket has been cleaned after depriming and came out bronze in color and dull. The pile has been cleaned after depriming and came out green and shiney.

Paid Advertisement
--
Chris_1522  [Team Member]
5/2/2013 8:58:56 PM
Dude, OD cases! Sweet!

I have no idea what caused that but I'm in for the ride to find out.
ar15rabits  [Member]
5/2/2013 9:00:52 PM
sell it as, TACTICAL BRASS
VT_K9  [Team Member]
5/2/2013 9:40:38 PM
Degrease your SS media, use a little less Lemi-Shine, make sure you use enough Dawn (it will help keep the grease build up down) so the junk cleaned off will stay suspended.

I have had this happen before to me and this is when I clean my media. The first time was when I stopped washing my PAM lubed case in a de-greaser prior to tumbling.

FWIW there is another recent thread on this topic which has some information.

Good Luck,

Mike

Edit to add-- I use a 1/2 gallon of brass and fill the container of water. My tumbler is homemade. I use a 6" drain pipe that is about 24" long. I use 5 lbs of media. I use about 1/2 a 44 mag case for the Lemi-Shine and a little more than 3 seconds of Dawn.
dcat  [Member]
5/2/2013 9:47:43 PM
You don't need lemishine to remove case lube. Hot water and Dawn in a bucket will do that.
jacobsk  [Team Member]
5/2/2013 9:57:43 PM
Originally Posted By VT_K9:
Degrease your SS media, use a little less Lemi-Shine, make sure you use enough Dawn (it will help keep the grease build up down) so the junk cleaned off will stay suspended.

I have had this happen before to me and this is when I clean my media. The first time was when I stopped washing my PAM lubed case in a de-greaser prior to tumbling.

FWIW there is another recent thread on this topic which has some information.

Good Luck,

Mike

Edit to add-- I use a 1/2 gallon of brass and fill the container of water. My tumbler is homemade. I use a 6" drain pipe that is about 24" long. I use 5 lbs of media. I use about 1/2 a 44 mag case for the Lemi-Shine and a little more than 3 seconds of Dawn.


Thanks for the heads up, I just filled the bucket and squirted in a bunch of dawn to tumble the pins clean. I tumble in a 5 gallon pail with 10lbs of pins so hopefully this will clean them overnight.

Originally Posted By dcat:
You don't need lemishine to remove case lube. Hot water and Dawn in a bucket will do that.


It was more of an attempt to clean the primer pockets than take the lube off. The primer pockets are spotless, and the entire case looks great... just jungle green.

maybe I should be selling the stuff at the LGS as jungle brass
dryflash3  [Moderator]
5/2/2013 10:00:46 PM
Not enough Lemishine.

For a Thumbler model B, you use a 45 ACP case full. That's with 1 gallon of water.

If you are tumbling to remove the lube, increase the amount of Dawn you use. Like 1 extra squirt.
SteelonSteel  [Team Member]
5/2/2013 10:06:47 PM
A gallon? I just cover the brass and pins with water, a squirt of dawn and a dash of lemishine. I'd be afraid to put that much water in and have my belt slip. the whole dang container looks like it's gallon sized.
Stiles1410  [Member]
5/2/2013 10:08:52 PM
The problem is too much Lemi shine I had the same problem a couple weeks ago the lemishine is dependent on your water characteristics hardness and ph. http://www.ar15.com/forums/t_1_5/1467385_Why_is_my_brass_green___now_with_pic.html
faldoc  [Member]
5/2/2013 11:52:56 PM
I used the old sticky RCBS lube in the tube once and it was still on the cases after tumbling for several hours, the cases were dark a bit green, but I could wipe a lot of it off. I had to wipe it off using towels and the next tumbling they came out shiny. But sometimes that's the only lube that gets my cases through the re-sizing die. I might try rinsing them off using alcohol next time.
BIGGDAWG  [Team Member]
5/3/2013 8:09:33 AM
If you are tumbling lube off you need t add extra dawn to the batch, i add 2-3 seconds of squirt when i tumble lube off. you really can't have too much soap other than suds. I also think you are too light on lemi shine from my experience. just had a batch this weekend come out like yours and i had cut back on the lemi shine. i added more and retumbled they came out like usual.

in 2 gallons i use 2-3 45 acp cases of lemi shine just for reference.



xtreme762  [Team Member]
5/3/2013 12:18:29 PM
With 2.5 gallons of water, a 44 mag case of Lemi-shine, and 3 second squirt of Dawn. I let 500 - 1000 case run for 2.5 - 3 hours MAX. Any longer and my cases start turning different colors. Including pink, orange, green, purple, and red. Normally 3 hours is on the edge of to long.

If after 3 hours the cases aren't clean to my standard. I'll rinse them several times thoroughly, and run them in the tumbler again for 1.5 hours or so. This equals perfect brass every time.

I normally re-size, and deprime BEFORE throwing the cases in the tumbler so the cases are ready for trim, debur, and chamfer in a clean state. Doing it this way, though, you have to make sure to clean your size/deprime die frequently.

jacobsk  [Team Member]
5/4/2013 12:36:20 PM
Thanks for all the responses.

So I've made a few changes per your advice and we're almost there.

I cleaned the SS pins by running them by themselves for about 24 hours with just water and a 6 second squirt of dawn.

I ran the brass in 1 gallon of water, with two 45ACP casings worth of lemi-shine, and a 3 second (normal) squirt of dawn.

Lastly I cut the tumbling time down from ~10 hours (work day) to 2.5 hours (weekend) this morning...

The result is on the right.



I threw it back in with 3 45ACP casings worth of lemi-shine to see if it gets even shinier
faldoc  [Member]
5/4/2013 2:11:15 PM
I have found with tumbling 308, these cases are pretty heavy and the longer you wet tumble them into each other the more the neck rim gets beat up and it develops a ridge you can feel with your finger nail. I don't think it is large enough to affect seating in the chamber of my guns, but I haven't tried shooting any yet. At worse you have to shave it off with a chamfer tool. I also chamfer the inner neck after tumbling. 223 cases don't seem to get nearly as much of a ridge...
Scorpius  [Team Member]
5/4/2013 5:30:05 PM
yours is classic case of not enough dish detergent. if you ran your fingers across the brass rubbing it, you would see it was just your sizing fluid that was caked on there. had that happen once to me, never have to clean my SS pins, just use enough dawn and that resolves the problem.
viper5243  [Team Member]
5/5/2013 5:23:02 AM
I have had green, pink and brown brass come out.

Pink was when i had random steel cased nested in larger rounds

Dark Brown is actually pretty cool. There was a bunch of water in the bottom of the 55gal drum of brass i got and the rust from the bottom of the barrel stained the brass. They look almost the same color as azoom snap caps. It's nice when i fire them at the range i know they are mine.
Counselor  [Member]
5/5/2013 10:46:50 AM
If you want dark brown brass, leave the cases in the weather under a fir tree for a few months. The acids sort of anodize the brass. I get this all the time at the IDPA range where I shoot which has a lot of fir trees.
Paid Advertisement
--