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Chemi Blacking

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mick24/02/2011 17:29:54
421 forum posts
49 photos
Hi All.
Now I remember reading something about chemi blacking the other day, but have forgotten exactly where, so could I scratch your collective brains again and ask for a suitable product to blacken some cylinders and if possible a source of supply.
Thanks in advance
Ramon Wilson24/02/2011 17:35:49
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1655 forum posts
617 photos
Are they steel cylinders Mick? If so Jenolite Kold Blak will do the trick though it does not wear as well as the professional process which involves heat I believe.
 
One of the model engineering suppliers used to sell a similar product at shows - sorry can't help you with a name perhaps someone else can help.
 
Kold Blak has a long shelf life - I bought mine in the mid eighties and it still works fine.
 
I'm sure others will add to this
 
Regards - Ramon
 
 
 
 
Jim Greethead24/02/2011 19:52:54
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131 forum posts
8 photos
I am using Blackfast - a room temperature process for iron, steel and zinc. Mine came from John Lines in Queensland (Australia) whose email address is john@ protecmetals.com.
 
The kit came with the chemicals, sealable containers in which to use and keep the diluted chemicals already labelled, comprehensive and clear instructions (the process is simple) and product safety data sheets for each of the chemicals.
 
The chap who recommended it to me has had his for about 5 years and it still works.
 
It works for me.
 
Jim
Robert Miller 124/02/2011 20:13:56
19 forum posts
There is a detailed article on Parkerizing in the latest newsletter of the Huston, Texas based "Home Metal Shop Club".
 
This club seems to be very active and has a lot of good info on their website.
 
Bob
oilcan24/02/2011 20:56:47
34 forum posts
GLR sell both a hot black solution as well as a cold (room temp.) solution.
only used the cold solution . worked O.K.
usual disclaimer
Mike25/02/2011 11:47:41
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713 forum posts
6 photos
Various products for blacking steel and sold by most gun shops.
KWIL25/02/2011 14:04:28
3681 forum posts
70 photos
Metablack from Delway technical Services is a good cold solution. usual disclaimer
John Coates25/02/2011 14:32:11
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558 forum posts
28 photos
Will blacking help prevent rust ? Only as as some stuff I turned last year seems to have developed a few rust spots over the winter. Was originally black bar and now obviously I've removed the outer layer to produce the finished piece. As it's a tailstock die holder I need it to have good life expectancy without being eaten away by rust.
 
Mike25/02/2011 14:49:01
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713 forum posts
6 photos
The gun blacking compounds I have used do not prevent rust. In fact, unless the parts are first scrupulously cleaned after blacking, then oiled, they seem to promote rust - probably because of their acidic nature.
KWIL25/02/2011 14:53:47
3681 forum posts
70 photos
Once you have blacked it and then washed it, dewatered it, you then must immerse in oil and allow the oil to penetrate the coating. Leave it for some time, say 1-2 hours. Then drip "dry". If kept "oily" it seems OK but if you wipe all the oil away and then leave it in a "wet" atmosphere, it will rust. Commercial blacking is a lot harder and durable.
mick25/02/2011 17:09:52
421 forum posts
49 photos
Thanks for all suggestions, certainly something to be getting on with.
Regards.
Mick
mick25/02/2011 18:00:54
421 forum posts
49 photos
Is there a web site or e-mail address for Delway Technical Services as all I can find is a postal address and phone number.
There dosn't seem to be a UK supplier for Kold Blak and there now seems to be a rap band of the same name!
Is the £45 GLR are asking for their kit what I should be looking to pay for chemi blacking?
Thanks.
Mick
Keith Long25/02/2011 18:32:48
883 forum posts
11 photos

Hi Mick

Have a look at the following website:-

http://www.finescale.org.uk

If you look down the navigation side bar you'll see a link to metal blackening. I believe the products are made by Carrs. I've not tried the version for white metal / steel, but I have used the version for brass and been very happy with it. The brass version is all cold operations and I believe so are the others. The small pot at £4.50 sounds to be worth a try.

Keith


Ramon Wilson25/02/2011 22:36:10
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1655 forum posts
617 photos
Ah Mick, gone eh - like near everything else these days.
 
However how about this
 
Appears they do a litre kit for under £20 plus post. That's a lot of cylinders
 
Hope this helps - Ramon
mick26/02/2011 15:48:46
421 forum posts
49 photos
Hi Ramon.
Thats a great help, the price is a bit more like it! Thanks.
Regards.
Mick
Stub Mandrel24/03/2013 20:56:01
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4318 forum posts
291 photos
1 articles

Can anyone point me towards a source of Jenolite Koldblak?

Google doesn't seem to be much help for some reason.

Neil

RJW24/03/2013 23:13:25
343 forum posts
36 photos

I've used this stuff for years, mainly on gunmetal pocket watch cases, but also used it to revive previously blacked tooling, never had any rust come back once soaked in oil!

**LINK**

Dan Smith24/03/2013 23:40:52
1 forum posts

I've never used it, but Frost do a chemical blacking kit too - **LINK**

John Stevenson25/03/2013 00:02:57
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5068 forum posts
3 photos

I put a brand new kit on ebay last week to get rid of it but didn't get any takers.

Bit surprised as it was unopened but just need it out the way.

**LINK**

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