 We need to make this QR code using an AutoCAD file and then we make it compatible with the Optimik Erasal Jet That's our printing machine up at School of Mines We start printing using our ink This is the ultrasonic automizer we have and we usually use one ml of ink in the vial Once we give the automizer value it starts automizing the ink and once we give the automizer flow value It takes the ink from the vial to the head through the pipe and then once we give the sheath It prints the ink onto the substrate through the sheath and so far we've successfully Printed lines of about 50 microns with the control parameters We see these Paper samples that we printed on you don't see anything so it's totally covert We don't see anything and the designs are robust This is the laser 980 nanometer laser we got and it's got 8 watts power in it So once we excite these QR codes using this 980 nanometer laser They show up in green color because of that conversion So this IR will be up converted into a visible light at 530 nanometer laser 530 nanometers wavelength by these QR up converting nanoparticles Using a camera with the IR lens fixed it because the cameras usually pick up the IR not the up conversion So we have that IR cut-off lens attached to our camera So that it just sees the QR code once we got the QR code we scan it using an smartphone as QR code application it ended readily scans into whatever we put into the QR code in this case We used our schools name, which is SD SMNT South Dakota schools for school of minds and technology So we have different sets of up converting nanoparticles one up converts into green one up converts into blue So we use both of them to create these up converting to our codes as I showed you in the in the video so by using this the We can increase the potentiality of the security printing because we can vary the sizes of the Alphabets or characters assembles whatever we put into the QR code from microscopic to microscopic level So once we print something Microscopic embedded in the QR code, so we are making it into forensic level