Strange pattern

Albert · Yesterday, 10:01 PM

Has anyone seen a pattern like this on a sword blade?
What is it, and how should I treat it?
Any thoughts are welcome.

The sword is a Sumatran Cot Jang.

A. G. Maisey · Yesterday, 10:42 PM

This is a laminated blade that has been produced from ferric material with varying levels of carbon, it is also possible that the entire blade was quenched during heat treat, rather than just the cutting edge. It is possible that the lighter coloured material contains some nickel, it could well be iron from Sulawesi.

Personally, I would simply oil & use steel wool on it, the variation in blade colour tells a story.

Battara · Today, 01:38 AM

I'm with Alan. Oil and enjoy.

Albert · Today, 10:10 PM

Thank you both for your comment.

Yesterday, 10:01 PM	#1
Albert Member Join Date: Jun 2005 Location: The Netherlands Posts: 213	Strange pattern Has anyone seen a pattern like this on a sword blade? What is it, and how should I treat it? Any thoughts are welcome. The sword is a Sumatran Cot Jang. Attached Images

Today, 10:10 PM	#4
Albert Member Join Date: Jun 2005 Location: The Netherlands Posts: 213	Thanks Thank you both for your comment.

Yesterday, 10:42 PM	#2
A. G. Maisey Member Join Date: May 2006 Posts: 7,239	This is a laminated blade that has been produced from ferric material with varying levels of carbon, it is also possible that the entire blade was quenched during heat treat, rather than just the cutting edge. It is possible that the lighter coloured material contains some nickel, it could well be iron from Sulawesi. Personally, I would simply oil & use steel wool on it, the variation in blade colour tells a story.

Today, 01:38 AM	#3
Battara EAAF Staff Join Date: Dec 2004 Location: Louisville, KY Posts: 7,415	I'm with Alan. Oil and enjoy.