Jambiya restoration Take 2

DaveS · 21st February 2007, 02:55 AM

Iv'e etched many, many blades, both wootz and layered steel. My experience with ferric chloride has been that no matter what, it will give a slightly greenish-brown tinge to the steel. Wether this is due to the acid possibly containing some compound of chlorine i do not know. Try using phosphoric acid. It goes under the name "metal etch" at Orchard Supply Hardware. I have used it for many years on layered steel such as on moro swords, and i feel it gives a MUCH better etch and is easier to use. You don't even need to dilute it AT ALL!!!!!!. It has the added advantage of not turning silver black as ferric chloride does. Normally i etch wootz with ferric, but the last few times i have etched wootz with phosphoric with outstanding results. Also i have never had any problems using plain tap water, but that might have something to do with the minerals that occur naturally in the water, and would vary from area to area. As someone just stated, you do want to dry the blade as quickly as possible because as you have seen it starts to rust instantly...........Dave

DaveS · 21st February 2007, 03:11 AM

I forgot to add that i use a resin brush to apply the acid, brushing it on one side and then turning the blade and brushing it on the other side. Keep turning and brushing and observing the blade until you get the desired amount of color change. Iv,e also found that when you start to apply the acid that you get both sides wet quickly and keep them wet until you rinse the blade. Another way you can get a little more contrast especially on layered steel is to very carefully heat the blade evenly with a propane torch. It just needs to be heated just enough to open the pores in the steel. Done correctly, you will have a beautiful contrast between the high and low carbon areas. The acid will sometimes smoke a little bit but this does not effect the quality of the etch..............Dave

spiral · 23rd February 2007, 11:30 PM

Dave, what percentage phosphoric acid. Is "metal etch" ?

I can get 81% phosphoric acid localy but I think that may be rather to strong?

Spiral

21st February 2007, 02:55 AM	#1
DaveS Member Join Date: Feb 2006 Posts: 327	Iv'e etched many, many blades, both wootz and layered steel. My experience with ferric chloride has been that no matter what, it will give a slightly greenish-brown tinge to the steel. Wether this is due to the acid possibly containing some compound of chlorine i do not know. Try using phosphoric acid. It goes under the name "metal etch" at Orchard Supply Hardware. I have used it for many years on layered steel such as on moro swords, and i feel it gives a MUCH better etch and is easier to use. You don't even need to dilute it AT ALL!!!!!!. It has the added advantage of not turning silver black as ferric chloride does. Normally i etch wootz with ferric, but the last few times i have etched wootz with phosphoric with outstanding results. Also i have never had any problems using plain tap water, but that might have something to do with the minerals that occur naturally in the water, and would vary from area to area. As someone just stated, you do want to dry the blade as quickly as possible because as you have seen it starts to rust instantly...........Dave

21st February 2007, 03:11 AM	#2
DaveS Member Join Date: Feb 2006 Posts: 327	I forgot to add that i use a resin brush to apply the acid, brushing it on one side and then turning the blade and brushing it on the other side. Keep turning and brushing and observing the blade until you get the desired amount of color change. Iv,e also found that when you start to apply the acid that you get both sides wet quickly and keep them wet until you rinse the blade. Another way you can get a little more contrast especially on layered steel is to very carefully heat the blade evenly with a propane torch. It just needs to be heated just enough to open the pores in the steel. Done correctly, you will have a beautiful contrast between the high and low carbon areas. The acid will sometimes smoke a little bit but this does not effect the quality of the etch..............Dave

23rd February 2007, 11:30 PM	#3
spiral Member Join Date: Dec 2004 Posts: 1,712	Dave, what percentage phosphoric acid. Is "metal etch" ? I can get 81% phosphoric acid localy but I think that may be rather to strong? Spiral