![]()  | 
	
| 
			
			 | 
		#3 | 
| 
			
			 Member 
			
			
			
				
			
			Join Date: Dec 2004 
				Location: Europe 
				
				
					Posts: 2,718
				 
				
				
				
				
				 | 
	
	
	
		
		
			
			 
			
			Thank you for your answer. You write that the result is interesting; in what way do you mean this? 
		
		
		
		
		
		
		
	If it gives a weak acid, this means that it is easier to control, but takes longer time than if you use ferric chloride. Have you tried with salpeter? BTW Francoise Bernier, a Frenchman travelling in India around 1650 writes, that they, in order to keep the water cold when it is hot, put a handful or two of saltpetre in the water. Maybe it cools the water, but I wonder how healthy it is to drink the water. Regards Jens  | 
| 
		 | 
	
	
	
		
		
		
		
			 
		
		
		
		
		
		
		
			
		
		
		
	 | 
		
  | 
	
		
  |