 In this video, we are going to show three different methods to review LC-101 and LC-103 cartridges. The brother has a straightforward way of checking cartridges. First, a check if a cartridge chip exists. If the chip passes the test, it will ask you did you change the cartridge? If we have a non-working chip, we can simply say no. Then the printer will go on and using the previous cartridges information. Otherwise, the printer will read a chip and determine the ink level. The printer detects ink level from these windows. The printer shines a light on the window and sees the position of the black plastic. Thus refilling is pretty simple. We already have a working cartridge with the chip. And then the only thing we need to do is to add in. Let's take a look inside the cartridge. There's a bladder which controls the black piece. When you have inks inside, the bladder will float and block the light from the window. On the bottom is the ink outlet. The outlet has a spring loaded valve. When we inject ink, we use a tool to push the spring inside and release the ink. On the top, there's an air release valve. When you push it, the air can come in and out. The easiest way to refill is to use a plastic adapter, also called a quick ink transfer tools, available at bchtechnologies.com. We fill up the syringe with ink, then push the needle inside the valve and point the needle sideways. The pressure will be high inside the cartridge. So we need to press the air valve a few times to release the air. We use a paper towel wrap around the pen. The paper towel will catch any ink discharge. Now we move on to the second method. What if we don't have an adapter, but we have a regular needle? Then we can just use it as an adapter and repeat the same routine. We inject ink from the bottom and the release air from the top. In the third situation, we have neither adapter nor needle. Instead, we have a 30mm bottle look like this. We started by taking away the transparent casing. We save this casing for later use to reseal the container. From an angle, we cut off the tip of the black plug. Now this black plug can be used as an adapter. Finally, we put the casing back on the complete project. If you have a bchtech standard bottle, you won't need any of those tools. We use a pair of scissors to cut the light opening on the top. And then we push the tip inside the valve and the refill cartridge. I hope you enjoyed this video. Visit us at www.bchtechnology.com or local at Grisbrough of Colorado. Happy printing! Cheers!