Calibration Swatch 3mm

This is version 30.5 of my 3mm Swatch for filament testing. I print one for every roll and use them to sample colors. This is marked for .15-2.4mm and i have calibrated it and made adjustments so that is how it prints. I put text onto it such as purchase date and color, outset at .75mm. I have spent 100's of hours making this perfect as i can.