Waterjet Channel: What If Knives Were Made of Salt?

What if your kitchen knife was made of salt? Would everything you cut be perfectly salty? You see, I made a pan out of salt, and that worked pretty well. But it only works on things you cook. This guy made a fork out of salt, which works for everything, but it's really gross to share. My friends have herpes. I wanted something that could do it all perfectly, and then it hit me. Make a knife out of salt. So my objective is to make a salt knife that is one, not gross, two, works on everything, and three, impressive enough to win my wife's approval. Oh, wow! We're also giving away $1,000, but more on that later. To make the knife, I'm gonna try casting it out of molten salt. Now, we all remember how that went last time with the salt pan. No! But a knife is a lot thinner and a much simpler shape, so I think there's a good chance we can get this to work without any cracking. I started by filling up a crucible with some salt. It's a little damaged, but I don't wanna contaminate another crucible with salt, so I'm gonna risk it. All right, I'm thinking we take some steel foil and form it around a knife, and that'll make our mold. If it's stupid and it works, it's not stupid. We don't know if it works yet. Someone commented that heating the salt in the kiln was going to destroy it, and at first I didn't believe them, but then the bricks started falling apart. How do you people just know these things? Anyways, let's put some salt in the kiln. All right, here goes nothing. I'm really hoping this doesn't go catastrophically wrong. Oh, shoot. That is a chunk of the crucible. We're gonna try pouring anyways. Very nice. No, it already cracked. It's easy to get it out of the mold. Wow, that is a weird texture. I think I know how we can fix this. I'm gonna try using a traditional sand mold, which should dissipate heat a lot slower, and I'll pour out less salt so it's thinner. Hopefully, this will be enough to avoid cracking as it cools. All right, that's as thick as we go. I carefully remove the sand without disturbing the knife because I know it's brittle. All right, I gotta be real careful here. Ooh, that is thin, but it looks great. Oh, yeah. If I've learned, apparently I haven't learned anything. I was about to say, if I've learned anything about casted salt, it's extremely brittle. I don't think casting is going to work, so I think we just need to suck it up and buy another expensive block of salt. Remember this piece of the crucible from earlier? Check this out. This is how thick the crucible is, and this is how thick the piece that broke off is. Oh, I had this much graphite between me and lava spilling all over the shop. Oh, no. Something came in the mail today. Ooh. A pristine block of salt. This is very nice. Let's see. That's salty. So I did a little research, and it turns out when you cast salt, as it cools, it forms these little crystals, and there's also some cracks and bubbles in there, and those are all points of failure, but in a solid block like this, it's formed over millions of years, and the crystals are much larger and much more stable, so this should be a lot stronger than the casted salt. Holding salt like this is so weird because you kind of start to sweat, and then your sweat kind of dissolves the salt, so then you're getting salty sweat all over yourself. The block is just barely big enough to fit a knife if I cut it the long way, so I put it on the water jet, got it all lined up, and cut me off a slice. I didn't turn on the abrasive because I wanted to see if it would cut well enough using just water. Ooh, the cut is so clean when you use only water. Let's look at this. Wow. Look at this beautiful piece of salt. That's crazy. I can already tell this knife is gonna look really good. 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That could get you an entire set of Milwaukee tools. And thank you to Whatnot for sponsoring this video. Now let's get back to this salt knife. I put the salt slice on its side and started cutting a knife shape into it. But the water jet was so violent that it started moving all over. So I had to stop it early. Well, shat. It did not want to stay in the same place. Okay, yeah. Hey, look at that. We got ourselves a salt knife blank. This looks so cool. That's like glass. We got some minerals in there. Wow. Probably the coolest looking knife I've made so far. Now we need to turn this knife blank into an actual knife. And to do that, I had to dust off the old cabbing machine. This machine is for polishing rocks, but we only ever use it for ridiculous materials. And this salt is no exception. So sorry in advance for the inevitable rusting. I started by removing the piece of the handle that was supposed to be cut off by the water jet. Everything was going really smoothly until I stopped using both hands so you, the viewer, could see better. Well then. I could just try gluing this piece back together, but if I want to impress Mrs. Water Jet, we're going to have to do this the proper way. While I'm cutting out another one, make sure to subscribe because we're so close to hitting 20 million subscribers. This new one is a lot thicker than the old one, but there is a scary crack right there. So I got to be careful. This time I'll film with a head mount so I can use both hands and you can see what's happening. We're getting a nice bevel, but I need to be careful because the water that prevents dust is simultaneously dissolving my salt knife. So I better move on to the higher grit sharpening wheel. Getting some chipping here. Not feeling chipper about that. The chipping means the cabbing machine is too rough. So I'll have to do the rest by hand. All right. Let's sharpen some salt. I'm nervous about this big crack right here at the weak point. I started using the sharpening stone without water because I didn't want the sharp edge to get dissolved. It was working fairly well until disaster struck. Oh no. Believe it or not, I actually learned my lesson the last time it broke. So I actually had a spare knife ready to go. We've got our dead knife here to remind us what happens. And here's our new one. But I had to be extremely careful because this was my last knife that I had ready. If it broke here, I'd have to start all the way over. I think if I add some water, that'll help with the flaking off. Just a little though. Salt water. Great for your diamond sharpening blocks. All right. I think it's sharp enough. It's time to test. We're going to put this knife through a series of four tests, each one getting progressively more difficult. The last one is definitely going to be the tricky one. Wish me luck because if this doesn't go well, I'll be sleeping on the water jet tonight. All right. Can a salt knife cut a tomato? Oh, it's working. No way. That's crazy. The blade geometry is a little thicker than I would prefer. So it's a little hard to get a really thin, nice cut, but it works really well, actually. Let's go for a thin one. Oh yeah, it's working for a very thin slice here. Look at that. Ooh, look at that. That is paper thin. Oh no. Look, the knife is dissolving. I'm losing my edge here. Okay, here's the real question. Is this slice of tomato salty? Wow. Oh, that's way too salty. I got to use the back of the knife now because the middle's dull. Let's move on to the cucumber test. Okay, it's cutting. I might need to visit the sharpening block again. It made its way through. We're losing sharpness by the second. It's only sharp on the front now. Okay. That actually did really well. Uh-huh, yep. Getting my daily sodium intake. Look at that. What if I cut off a slice of cucumber? Let's do a thicker one to offset the salt content. And we add a touch of vinegar. Oh, that might have been more than a touch. It's a pickle. I'm like Remy combining the strawberry and the cheese. I think I need to go sharpen the knife before the steak test. Really not as cool as a flame, is it? We have our steak. Will the salt knife be able to cut the steak? Oh, it's working. No way. I honestly didn't think it would really work. It's definitely taking a little bit of sawing. But it's working. And it's seasoning the whole way through. That's a rare steak. Let's cut off our slice with our salt knife. So this piece is purely cut with salt knife. Now, we need a control. So we'll cut off a piece with a normal knife. So now it's time to taste them and see if it actually makes a difference. But I do need an assistant to make sure I'm not just making things up. Miss Water Jet, would you please join me? Thanks for coming. So we're gonna try these pieces of steak and you're gonna tell me if there's any differences. Is this a test? Sure. Now, first, try this one. Okay. Did it seem like there's any seasoning on it? No. Okay. Let's try this one. Oh. Oh, wow. What did you do to that? Salted. Making my eyes water. That's the culprit? That is the culprit. Very salty. It works. Is this all I'm getting for dinner? Yeah. Do you think if you cut yourself with this, it would sting and disinfect your wound? Salt in your wound? I think so. I would have never imagined that that would happen either. It's fragile. Don't put that in the video. Worst part is we didn't get it on camera. I wouldn't think that much salt would come off just by cutting it. Yeah. Like, you wouldn't think just rubbing a salt knife on some meat would make it that salty, but it does. Thank you for coming. That's what she said.