|  | 
|  28th June 2018, 10:28 AM | #15 | 
| Member Join Date: May 2006 
					Posts: 7,085
				 |   
			
			Ariel, I've never used Nital, but I understand it is comprised of nitric acid and alchohol, as such, I would expect it to be a very good etchant, but I would not expect it to stain ferric material blue-black. Arsenic stains ferric material blue-black.
		 | 
|   |   | 
| 
 | 
 |