How to Harden a Knife

Shean Mulhall: The new knife. Chris Grant: Oh do your knife first and just because and so do we and what I'm going to do is I can put them all the way in an oil but I find like there's two different ways to definitely the mark the blade. You can put just three end and what you can do is just put the edge on and move it slightly and I'm probably going to do a combination of both. Shean Mulhall: Okay. Chris Grant: I'm just going to put the oil where it's going to come on each other here so for the main reason I want to do is I could easily just fit of to the edge but I want you to have straight concession. Shean Mulhall: Yeah, okay. Chris Grant: You see I have left this part there so I want that to— Shean Mulhall: So that would still be hard on the tip? Chris Grant: Yeah, hopefully. Shean Mulhall: Yeah. Chris Grant: There we go. This will take about a couple of minutes to get this up in temperature. I want to try and get up to sort of a great there just about the orange look. What I'm trying to do is move that back. I don’t want to hook at the fire because you know, for me you can see my color. Shean Mulhall: Yeah, okay. Chris Grant: And this last—if I live this in here you get it too hot then— Shean Mulhall: All the hard work is ruined. Chris Grant: It could be. But I guess still in the butt to turn this to something else. Another for— Shean Mulhall: To make another fire there. Chris Grant: Yeah, you see I have seen there and let it don’t get it until yellow color. If you know the sparkling some flame if you get here perfect. Do you know it came out and had a sort of globe on there? Shean Mulhall: Yes. Chris Grant: Yeah, all right, that was on any cool curving too and when you get man all that whole you actually get the steel light something—I have done more enough steel. Shean Mulhall: All right, okay. Chris Grant: But it's not any use like, it’s not use with steel it just don’t. Shean Mulhall: All right. Chris Grant: By the way how you deal with them, you can—we actually—and pull it through. So they're using charcoal. Sometimes they use copper, sometimes copper. Shean Mulhall: And you don’t use charcoal that— Chris Grant: I do use that because the most—there are few you can use for this kind of fire—it’s a breakthrough but I just—. Many times, three time faster, four things faster— Shean Mulhall: But that’s coke? Chris Grant: That’s coke, yes. Shean Mulhall: Yes, so that’s we go easy? Chris Grant: You — Shean Mulhall: Right. Chris Grant: But again the temperatures are very even or let say I've got the temp hot, when I say and get that fairly even. Shean Mulhall: And obviously trying to save your eyes as well. Chris Grant: Yeah, just take—I just try not to spoil my filler perception. Shean Mulhall: You can just wear those goggles. Chris Grant: Yeah, it’s a good point. All right, so while a fire for that don’t do this when you could just thick it enough, you know, find that something or they got both. When this is over, it’s done, this is how all things are heat treated before, we had little furnaces with thermometers on them. Now we’re get in some place now. That way is a—I think—it’s not for the steel that’s for my eyes. You can actually harden them in water the water force because it got salt and just warm but I can look. Shean Mulhall: So the soak makes a difference drive in the water alone? Chris Grant: Yeah, it just kind of change or— Shean Mulhall: Okay. Chris Grant: —water makes it—well that feels so hard. Shean Mulhall: Right. Chris Grant: But to do at one more out of that. Great, here we go. Shean Mulhall: So it's not a quick dump there and yes this so I soak in there. Chris Grant: Yeah, I mean see if goose it a warm like second later and it’s cold but having pure—or you will get an angle you finger like absolutely and still hot but that’s why oil is really makes some change to the steel. No, I can tell a lot of sports. You see that while I was telling you about earlier—because the lane purpose that you get. When you—see how it goes black kid of skill and when free heat them, when you clench in oil which you get grey, Martin say it’s grey and you see the edge are up. You see the edge of that, so I can test that while filing over that’s the—I know your blade is harden so about there I don’t want to take that and what I'm going to do is that oil is make some warm so I'm just going to let and soak in the there for a little bit and heat secure in the—- That a 100% is hardened and we’ll hopefully have, I want to temple and got that’s Martin say in us. So what I do is I just leave that in there. Shean Mulhall: Right. Chris Grant: Done and the next step tampers it to make other soak there. Shean Mulhall: Excellent.