Question about blade's color

D

Dr. Cao

Joined
Jun 27, 2018
Messages
23
Hi, a new question, it is about the forging blade process. This is my brand new tri-technologies M9 bayonet, and I found the tip's color is darker(brown) than the blade(normal steel's color), is it a flaw?
Also, I concern the reason for the darker color is that the tip contacted with blood and had some chemical reaction on it. Thanks first.
A picture of the tip is here https://ibb.co/hqHvTz and here https://ibb.co/ctKAwK
 
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Its kind of hard to tell with the lighting of the photo. Could be it was sharpened on a belt and the tip got too hot and was burned.
 
I have a KA-BAR Zomstro that had that 2 tone look. After stripping the coating off, there was a visible difference about halfway down the blade. I checked the hardness with a file, and it felt the same for both colors. It was cheap and going to be beaten on and modded, so I just kept on using it. I have since beaten the hell out of it with no issues, so I feel safe in assuming that the difference is largely cosmetic. If your bayonet is a user, test it out the same way you would test any knife before you trust your fingers and eyes to it. If you want it to collect or resell at some point, definitely return it.
 
BitingSarcasm said:
I have a KA-BAR Zomstro that had that 2 tone look. After stripping the coating off, there was a visible difference about halfway down the blade. I checked the hardness with a file, and it felt the same for both colors. It was cheap and going to be beaten on and modded, so I just kept on using it. I have since beaten the hell out of it with no issues, so I feel safe in assuming that the difference is largely cosmetic. If your bayonet is a user, test it out the same way you would test any knife before you trust your fingers and eyes to it. If you want it to collect or resell at some point, definitely return it.
Click to expand...
I do want to collect, but I am not sure the other one is good, I bought it from Amazon.
 
Paint stripper removes most coatings. Sandpaper removes all coatings. Since you have such a hangup on blade coatings, I suggest you stop buying knives that have them... or learn to remove them.
I suppose it's out of the question for you to sharpen the knife and see that the surface discoloration disappears? If it got a little too hot during factory sharpening, it's not a serious overheat. Would have blued if it was.
 
palmerdl said:
Paint stripper removes most coatings. Sandpaper removes all coatings. Since you have such a hangup on blade coatings, I suggest you stop buying knives that have them... or learn to remove them.
I suppose it's out of the question for you to sharpen the knife and see that the surface discoloration disappears? If it got a little too hot during factory sharpening, it's not a serious overheat. Would have blued if it was.
Click to expand...
Will sandpaper damage the blade?
 
Sanding will first remove the paint and once it is through that it will take away steel. If you are serious, most people who strip blades use "scotch brite" pads to clean up the steel. "Citristrip" is what I like best to remove the paint first.
 
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