Tiny quantities of HCL and HNO3?

[Skeet_Man]

Sorry as this is not gold related, but based on a few hours of googling, this may still be the best place to ask.

I would like to experiment with what is known as "fume bluing", which is a black oxide process for carbon steel. It uses reagent grade hydrochloric and nitric acid. https://www.youtube.com/watch?v=T4wvALz-2fo

In reality, I need extremely small quantities of each, as each batch (just doing it for myself) requires a few DROPS of each.

The smallest and cheapest option I've come up with so far is 250ml of each from chemical-supermarket.com, for 66 bucks w/ shipping (250ml of each representing likely several lifetimes worth for what I'm doing). That will probably be what I'll go with if I can't come up with something cheaper (unfortunately the local science supply house won't sell to me without tax ID, business license, ect, or the cost would he half of that).

Not sure if it's really worth even bothering trying to buy in smaller quantities, or if it'd even be much cheaper since shipping represents a large percentage of the overall cost, but figured it wouldn't hurt to ask if anyone know where to buy smaller quantities at a lower overall price.

 

[FrugalRefiner]

That will probably be what I'll go with if I can't come up with something cheaper (unfortunately the local science supply house won't sell to me without tax ID, business license, ect, or the cost would he half of that).

Have you considered just getting a business license? Depending on where you are, it may not cost much at all. Where I am I can download the application from my county auditors web site, fill out the pdf file, print it, and mail it in with my $25.00 application fee. There is no cost to renew each year. They can be awfully handy once you have one.

Dave

 

[Skeet_Man]

It's not even close to worth it where I'm at, as it opens up a myriad of other requirements (zoning issues, sales tax reporting (even if you have no sales, you get fined if you fail to report), income tax reporting, insurance, ect).

That is NOT a Pandoras box I'm willing to open.

 

[butcher]

gold testing kits will have a little of each or in a mix of different concentrations...

 

[goldenchild]

Any reason in particular you want to do it that way? On a small scale you would be better suited using an ordinary gun blue. This is a really good one as paste stays on the surface
https://shop.birchwoodcasey.com/products/perma-blue-paste-gun-blue-2-oz-tube.html

But if you want a more professional finish hot bluing is the way to go.

Here's yet another method.
[youtube]https://www.youtube.com/watch?v=X-CDOJF-TmY[/youtube]

 

[kurtak]

Any reason in particular you want to do it that way? On a small scale you would be better suited using an ordinary gun blue. This is a really good one as paste stays on the surface
https://shop.birchwoodcasey.com/products/perma-blue-paste-gun-blue-2-oz-tube.html

But if you want a more professional finish hot bluing is the way to go.

Here's yet another method.
[youtube]https://www.youtube.com/watch?v=X-CDOJF-TmY[/youtube]

I agree with goldenchild - if you are doing it on a small/hobby scale (just bluing a personal gun once in awhile) the Birchwood Casey bluing kit works just fine

I have blued a few guns over the years using the Birchwood Casey bluing kit

The first one was an old Iver Johnsons 28 gauge break open shoot gun my grampa gave me when I was 14 years old (47 years ago) & yes I used to hunt with it (a lot) & it has held up well

The last one I blued was about 4 years ago - its an old Marlin 25 - 20 (about 100 years old I believe) the barrel was pretty will pitted on the outside so took quite a bit of work to get all the pitting out - I'm very happy with the bluing using the Birchwood Casey bluing kit (I have done like 5 or 6 over the years)

Kurt