Now that we understand how to remove the black channel from our original image, lets look at adding a new fake one back.
This video is part of a Mini-Series that covers printing dark values without having black ink.
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Hi there, guys. In today's video, we're gonna be looking at adding a fake K to our C. M. Y. And this will be done within coral draw. But before that, let's have a quick intro first. So today's video can be found on softwaretraining.co.za. We make short and easy to watch problem solving videos, and we also have daily updates. Otherwise, we're back into the programme here. So now in the previous video, we looked at actually removing k from our image. So like we tested with a colour dropper, if we zoom in here, we can see we currently have zero k on this layer. I'm just gonna zoom down a bit and you can get a brief idea so you can see the K is actually zero. Now, what I wanna do is we wanna add the actual K back. So what I'm gonna do is I'm going to duplicate this image. You can do that by simply going on your object manager. I'm gonna right click this and then from the dropdown menu. We're gonna go down till we find the copy one. If you go to the actual image we have duplicate. But in this one, we'll have copy. Then what I'm gonna do is I'm just gonna right click here and say Paste, just find that copy. I can do this. Here we go. So I'm gonna right click over here. Say paste. Not sure what happened there. You can still have the object selected. So paste. Now we've got two layers, exactly the same layers. So now what we're gonna do is with the top layer selected, and then we wanna actually remove the colour first. So I'm gonna go on top here to our top main menu. Click on this, fix the zoom click on the fix. I'm gonna adjust, and then we're gonna go down till we find the actual U saturation Lightness. So I'm gonna click that shortcut. You can see there is control shift U Click that and then from my actual plug in, I'm gonna go under the master so you can see we can isolate, Just sign in or anything like that, which you will be using in another tutorial. But in this one, I'm gonna go channels mask, then we go down to saturation. And then I'm gonna set this all the way down. So I'm gonna pull it all the way to the left and then in the preview, you can see now we've got a black and white image. Now, the next step, what we wanna do is we wanna isolate only dark colours on you. So, like all those rimming that shirt, maybe a bit of the eyes. But anyway, where's a nice gradient? We want to kind of remove that. So, uh, so we're gonna have a bit sharper image. So in order to do that, we want to set the tone. So I'm gonna go once again to the same menu. So we're gonna go on top to our main menu. We go to effects, go adjust, and then we gonna go down till we find this tone curve. Now you can use brightness and stuff like that, but it gets more tricky because you can easily add more black, and then your final result won't quite look at the same. It's gonna start adding K again. So now what I'm gonna do is get the tone curve opened. I wanna click about a third way up on this graph, and then you will see, once I click and hold with my left mouse button, it makes a little arm or this little controller point. So now I can either lift this and then it will start adding, um, black Or what I can do is remove lower this, and it will start removing some black. So I'm gonna go somewhere where there's only very little information left. And what I mean with information is so that you can see, for instance, by the nose We've got some, um, black value, but not all of it. So let me see. So on the nose you can see we don't have much detail on top there. But if I remove the preview, you can see Oh, there's actually a nice curvature or fade in variation of the tone. So I'm gonna go till I only can see the black I wanna show. Oops. See, let's try to reset. That thing had a bit of a freak out, so I'm gonna go somewhere about here. That looks nice. Then I'm gonna say, OK, so now we've got our actual top layer. So we ba basically desaturated that one without the K. And then now what? We're gonna do is we want to set its mode. So I'm gonna go here to my, um, Dockers here on the right. So now we were working on the bottom on the object manager. Now I'm gonna go to object properties, and when I click this, we have a few different options. Make sure your image is selected and then on top here with the three little tabs, I'm gonna go to the first one, which is transparency. I'm gonna click that. And then now you can see we have, um, transparency. And there's normal modes, which if you've used other programmes, art programmes, you should be aware of it. So I'm gonna click on this mode, and I'm gonna go down and set this to multiply. And then once I've said to multiply, it has kind of added a fake black. Now, when you find the export, it's gonna look slightly different because this is not the best 100% accurate representation. But, uh, I will show you guys how to get it even a bit more black, Uh, the process for that. So now what we can do is you can go to your colour picker and then we can just let it load again. We can see there's stalled zero K, even though it is way dark. I'm gonna zoom in here so you can see there's still zero K and it's way dark. So let's quickly move this layer underneath the other one so you can see the difference. You can see this was when we remove the K. And now what we do is we kind of putting it back with a fake K. And then, um, when we finally print, it's gonna be a bit more washed out. But it's still gonna look way better than having no black in your printer at all. It's gonna try to fake it. Yeah, before we get to the export options, which is quite important if we go here to softwaretraining.co.za. You guys will notice we've got a variety of different Softwares we do cover, and you can also isolate your search on the top right. If you do not find the videos you're looking for, just simply go. Yeah, request a training video, fill in the mini form, and then we'll do our best to try and make that for you. But otherwise thanks guys for watching and cheers
This article is part of our “Large Format Printer Printhead colour channel manipulation workflow” – see the article for more info.